I was having issues with nostrgram.co and finally figured out it was my Alby extension causing the problems so I reset its relationship to nostrgram.
It worked but when that happened I had to re-enter all the relay names I use and I think, somehow, my follow list got overwritten.
If I wasn't fully aware that we are 'testing in production' I'd be pissed but the only way we solve these issues is to directly experience the issues and report back to the creators/users so they can be informed of the issues even if it's something their client didn't effect.