diff --git a/crates/auxcallback/src/lib.rs b/crates/auxcallback/src/lib.rs
index eccf750b..f044fa5c 100644
--- a/crates/auxcallback/src/lib.rs
+++ b/crates/auxcallback/src/lib.rs
@@ -23,7 +23,7 @@ pub fn clean_callbacks() {
 }
 
 fn with_callback_receiver<T>(f: impl Fn(&flume::Receiver<DeferredFunc>) -> T) -> T {
-	f(&CALLBACK_CHANNEL.get_or_init(|| flume::bounded(1_000_000)).1)
+	f(&CALLBACK_CHANNEL.get_or_init(|| flume::unbounded()).1)
 }
 
 /// This gives you a copy of the callback sender. Send to it with try_send or send, then later it'll be processed
diff --git a/src/turfs/processing.rs b/src/turfs/processing.rs
index 791362e3..d1086acb 100644
--- a/src/turfs/processing.rs
+++ b/src/turfs/processing.rs
@@ -396,18 +396,12 @@ fn post_process() {
 					})));
 				}
 
-				let send_failed = sender
-					.try_send(Box::new(move || {
+				if should_update_vis {
+					drop(sender.send(Box::new(move || {
 						let turf = ByondValue::new_ref(0x01, id);
 						update_visuals(turf)?;
 						Ok(())
-					}))
-					.is_err();
-
-				if should_update_vis && send_failed {
-					//this update failed, consider vis_cache to be bogus so it can send the
-					//update again later
-					tmix.invalidate_vis_cache();
+					})));
 				}
 			});
 	});