...but all other tracked changes and comments show up just fine. This is infuriating to discover after hours spent reworking a long draft on the basis of what I thought were comments!

I have tried to replicate the issue using a one sentence file that I edited twice and then combined:
- when I pick 'show revisions in new document' the revised document's deletions are lost.
- when I pick 'show revisions in revised document', the orginal document's deletions are lost.

My company turns out not to have any key-users, but this function is vital for my sanity...

I hope someone knows how to solve this, thanks in advance!