[Sentry dashboard] Why Sentry forgets Ignore Issues, and shows them again after some while

In Sentry dashboard I have placed multiple CSP errors to “Ignore”. After some while (about 2 weeks) Sentry pops up again same errors. Why it happens? Is it Sentry bug?

BTW after places anything “Ignore”, Sentry dashboard doesn’t let to list those issue, is reported in [Sentry dashboard] Unable to list Fixed and Ignore Issues