This was raised before internally; here were my findings at the time:
I’ll try to get some clarity if this is still the case or if there’s anything we can do about it, but putting this here as a reference
transformPasted doesn't catch pasted - #3 by marijn - discuss.ProseMirror
Emphasis mine, the “bright side” doesn’t do us any favor as we’d still want to process this plain text as Markdown.
We don’t have an input rule for
[quote]
yet, this could help (assuming the IME input does the same as typing each character in the keyboard) IF the resulting pasted text didn’t have that broken closing[/quote]
from your first video.
Can you share how is this being pasted (in a code block preferably)? Does the resulting pasted text also have a closing bbcode tag broken in two lines like our internal report?