If it "helps" I see this behaviour on Linux/Chrome and on my Chromebook, which is very similar yo Charlies. By only selecting one block with the shift drag.
It expands the inner blocks in the other collapsed block! Not repeated after doing this the first time, as shown, but repeatable on restart of AI2 and opening project again.
I have been using chrome up til lately, but branching out to firefox to test apps in different environments
We can test another version with new fixes:
Closing, superceded by nb200b.
Hola, hace varios dias tengo un problema con el editor de bloques. Cuando descargo de la mochila mas de dos bloques, se queda bloqueado y no puedo hacer nada, no puedo mover, ni ocultar los que ya tengo en el editor, tengo que salir de app inventor y cuando entro de nuevo me ha añadido parte de los bloques