If you’re using a script to do so, make sure it’s handling API limits specifically for “edit” calls. I realized after I tried overwriting mine that it was quietly skipping a bunch of comments, presumably because there is (allegedly) a 1 edit call per 5 second rate limit. Since adding a 5 second delay between each re-write, it seems to be working for me.
I ran into this issue with u/j0be’s Power Delete Suite, I ended up writing my own script to do the job.
I found a new issue.
All of my comments on my profile are gone. All posts. Everything.
I can google my username and still find comments out there. Yes, I can go in and manually change/delete, but they’re not showing up on my profile for, let’s just say, ease of removal.