[Bug]: Stash record not removed when the oldest filter has the same timestamp

[willdurand]

What happened?

Given that it's possible to generate a filter and a stash at the same time (stash time = generation time), and that we remove the records older than the oldest of the two filters, in some cases we do not delete a stash record in the collection.

This might have unintended consequences.

What did you expect to happen?

All outdated stash records are removed.

Is there an existing issue for this?

• I have searched the existing issues

┆Issue is synchronized with this Jira Task

[willdurand]

Note that by fixing #15217, we would no longer run into this bug.