MIT App inventor randomly exclude one of my icons when I compile my project.

HI, I have this issue where I test my project and everything works but when I compile my apk one icon is missing, not showing. the 'invisible' button is still working but the icon is not there. when I recompile the same happens with another icon and the the previous one is showing but no way do I get all to show.

I have no idea what is causing this to happen.

There have been problems today with the build servers and the Google Cloud.  Please read the following, for which there's a link now on the splash screen for AI2:

https://docs.google.com/document/d/1wQy_1uCsZDAXY51wElbMyfy8AJid_EOqklIX_ggzBJY/pub