Unable to import/ Serious chunk loss

[xianfeng1128]

When I use the imagemap 4.2.3 on Minecraft for Windows Release 1.18.30 to import a map (size is 8 *13）
When I click “send all to the world", it seems to look like imported success. But when I entered the world, I found nothing imported. (I've just successfully imported my picture into this world) And I can't find any crash reports in the folder.
Worse, in my world， some chunks of my world are missing （All the content in the chunk is replaced by air）
I would like to provide information to developers to make the application better, thanks！

[tryashtar]

Please send me a copy of your world. The image you used and a recording of your process would also help. Thanks much

[xianfeng1128]

for try.zip
is that right？ Thanks a lot！

[xianfeng1128]

I have successfully recurrence the problem just now. Please wait a moment while I list my operation process

[xianfeng1128]

step1: I successfully imported picture 1,and found it
step2: When I import image 2, it is not found in the game
step3: I dropped structure blocks（picture 1） from the inventory in-game（This step may have no effect on the outcome
）
step4：I tried importing picture 2 again.
step5: When I enter the archive again, I observe that the chunk is missing
(In every software operation, I always leave the archive)