Are any of the bug reporters using Vivaldi? As for some reason that browser allows (and enables by default) clearing extension storage when clearing history/cookies via Delete Browsing Data.

This is something the Stylus addon dev noted when a user was reporting the addon wasn't remembering their settings and it was because the user had unwittingly wiped the extension storage due to the browser defaults.

(I actually use Vivaldi myself but virtually never use that feature so was unaware of the behavior until reading about the bug report)