"Server: block does not exist kbfs" on specific folder for all devices

I am getting this error on all of my devices and when I enable sync, kb sync is always loading/downloading stuff (never ends) and it hogs RAM. It's been a couple of months now, I've done several restarts, even formats (not to solve the issue, just regular usage).

The problem arose when I first cancelled uploading stuff cause it was too many (I removed the folder from fuse). My completely blind guess would be a majestic race condition.

my log id: c82491f4f31011e9c559621c

Start with log ID c82491f4f31011e9c559621c and the sequence where an upload was cancelled after the folder was removed from FUSE. Investigate why sync remains stuck downloading and consumes RAM across devices; done means identifying a reproducible cause and confirming that the affected folder sync completes without runaway memory use.

Written by the indexing model from the issue text.