Some bugs and feature were reported resp. requested regarding undo. This meta ticket aims to collect the information.
That would be over 100 bugs in all of the LibreOffice (not just Draw), as can be seen searching for bugs with the "undo" string in their short description: https://bugs.documentfoundation.org/buglist.cgi?query_format=advanced&resolution=---&short_desc=undo&short_desc_type=allwordssubstr
*** Bug 105948 has been marked as a duplicate of this bug. ***
(In reply to Johnny_M from comment #1)
> That would be over 100 bugs in all of the LibreOffice (not just Draw)...
Eight tickets for Draw, including this one.