I think there is a prblem with MIT App Inventor. I noticed it first when it stopped saving details to a Google sheet form and also when I was able to open two screens for MIT without enabling Multiple Screens option
Please provide a more detailed explanation of what you are trying to achieve,
what you have done so far, what works, what doesn’t work…
Please show your relevant blocks,
if relevant, your data or lists,
screenshots of the Designer screen or app in action,
so we can see what you are trying to do…
Right Click in Blocks Editor and select “Download Blocks as Image”
for the best image of your blocks.