Ah yeah it's not always clear from bug fix summaries exactly what was being worked on; there was a whole discussion about it on Discord where the bug-triggering code was posted (which itself is in the release notes but not being included in this thread, i.e. the full line is "fixed: Timer events should not fire when MsgBox/InputBox are displayed [ fafalone, discord ]" meaning it references a bug report/discussion on Discord; in other situations it will note a GitHub issue to refer to, or some other origin when it's user-reported).