I tried collapsing a procedure block, then it became like this
I don’t know how this event block became like this
Blocks downloaded from options menu by right clicking
I duplicated corrupted block and deleted corrupted block
Now it became fine
Varying ways this might happen, haven’t experienced this myself but from having repaired so many aia’s I have noticed that users are to lazy naming theirs screens, components (x, c, b, y) etc
Importing/ Copying screens
Un- / Install extensions
Bad internet/communication to server
Etc…