I use Chrome with windows 11 the scratch version is 3.0, just after they changed the location of the thumbnail to be in the same row as the zoom in button
this is what the code looked like:
when green flag clicked
forever
if <random thing> then
random code
end
end


It just deleted the forever loop and when I pressed ctrl+z the code didn't come back.
Any solutions to get back the code / ways to prevent it from happening again?

Can replicate.
My browser / operating system: Windows NT 10.0, Firefox 149.0, No Flash versions detected

Edit: reported the bug - https://github.com/scratchfoundation/scratch-editor/issues/533#issuecomment-4265113014