diff --git a/cvat-core/src/session.js b/cvat-core/src/session.js
index 87b545157df6..236893897302 100644
--- a/cvat-core/src/session.js
+++ b/cvat-core/src/session.js
@@ -77,12 +77,6 @@
                         return result;
                     },
 
-                    async hasUnsavedChanges() {
-                        const result = await PluginRegistry
-                            .apiWrapper.call(this, prototype.annotations.hasUnsavedChanges);
-                        return result;
-                    },
-
                     async merge(objectStates) {
                         const result = await PluginRegistry
                             .apiWrapper.call(this, prototype.annotations.merge, objectStates);
@@ -107,6 +101,12 @@
                             .apiWrapper.call(this, prototype.annotations.exportDataset, format);
                         return result;
                     },
+
+                    hasUnsavedChanges() {
+                        const result = prototype.annotations
+                            .hasUnsavedChanges.implementation.call(this);
+                        return result;
+                    },
                 },
                 writable: true,
             }),
@@ -381,14 +381,14 @@
                 * @async
             */
             /**
-                * Indicate if there are any changes in
+                * Method indicates if there are any changes in
                 * annotations which haven't been saved on a server
+                * </br><b> This function cannot be wrapped with a plugin </b>
                 * @method hasUnsavedChanges
                 * @memberof Session.annotations
                 * @returns {boolean}
                 * @throws {module:API.cvat.exceptions.PluginError}
                 * @instance
-                * @async
             */
             /**
                 * Export as a dataset.
diff --git a/cvat-core/tests/api/annotations.js b/cvat-core/tests/api/annotations.js
index 3400ea4efc1a..5bd97bd8206c 100644
--- a/cvat-core/tests/api/annotations.js
+++ b/cvat-core/tests/api/annotations.js
@@ -298,11 +298,11 @@ describe('Feature: save annotations', () => {
             label: task.labels[0],
         });
 
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
         await task.annotations.put([state]);
-        expect(await task.annotations.hasUnsavedChanges()).toBe(true);
+        expect(task.annotations.hasUnsavedChanges()).toBe(true);
         await task.annotations.save();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
         annotations = await task.annotations.get(0);
         expect(annotations).toHaveLength(length + 1);
     });
@@ -311,23 +311,23 @@ describe('Feature: save annotations', () => {
         const task = (await window.cvat.tasks.get({ id: 101 }))[0];
         const annotations = await task.annotations.get(0);
 
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
         annotations[0].occluded = true;
         await annotations[0].save();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(true);
+        expect(task.annotations.hasUnsavedChanges()).toBe(true);
         await task.annotations.save();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('delete & save annotations for a task', async () => {
         const task = (await window.cvat.tasks.get({ id: 101 }))[0];
         const annotations = await task.annotations.get(0);
 
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
         await annotations[0].delete();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(true);
+        expect(task.annotations.hasUnsavedChanges()).toBe(true);
         await task.annotations.save();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('create & save annotations for a job', async () => {
@@ -343,11 +343,11 @@ describe('Feature: save annotations', () => {
             label: job.task.labels[0],
         });
 
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
         await job.annotations.put([state]);
-        expect(await job.annotations.hasUnsavedChanges()).toBe(true);
+        expect(job.annotations.hasUnsavedChanges()).toBe(true);
         await job.annotations.save();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
         annotations = await job.annotations.get(0);
         expect(annotations).toHaveLength(length + 1);
     });
@@ -356,23 +356,23 @@ describe('Feature: save annotations', () => {
         const job = (await window.cvat.jobs.get({ jobID: 100 }))[0];
         const annotations = await job.annotations.get(0);
 
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
         annotations[0].points = [0, 100, 200, 300];
         await annotations[0].save();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(true);
+        expect(job.annotations.hasUnsavedChanges()).toBe(true);
         await job.annotations.save();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('delete & save annotations for a job', async () => {
         const job = (await window.cvat.jobs.get({ jobID: 100 }))[0];
         const annotations = await job.annotations.get(0);
 
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
         await annotations[0].delete();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(true);
+        expect(job.annotations.hasUnsavedChanges()).toBe(true);
         await job.annotations.save();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('delete & save annotations for a job when there are a track and a shape with the same id', async () => {
@@ -613,11 +613,11 @@ describe('Feature: clear annotations', () => {
         expect(annotations.length).not.toBe(0);
         annotations[0].occluded = true;
         await annotations[0].save();
-        expect(await task.annotations.hasUnsavedChanges()).toBe(true);
+        expect(task.annotations.hasUnsavedChanges()).toBe(true);
         await task.annotations.clear(true);
         annotations = await task.annotations.get(0);
         expect(annotations.length).not.toBe(0);
-        expect(await task.annotations.hasUnsavedChanges()).toBe(false);
+        expect(task.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('clear annotations with reload in a job', async () => {
@@ -626,11 +626,11 @@ describe('Feature: clear annotations', () => {
         expect(annotations.length).not.toBe(0);
         annotations[0].occluded = true;
         await annotations[0].save();
-        expect(await job.annotations.hasUnsavedChanges()).toBe(true);
+        expect(job.annotations.hasUnsavedChanges()).toBe(true);
         await job.annotations.clear(true);
         annotations = await job.annotations.get(0);
         expect(annotations.length).not.toBe(0);
-        expect(await job.annotations.hasUnsavedChanges()).toBe(false);
+        expect(job.annotations.hasUnsavedChanges()).toBe(false);
     });
 
     test('clear annotations with bad reload parameter', async () => {