Describe the bug

Do you have an error log of what happened?

Sorry, log not from the very beginning but the first two timers are the first casts I think so shouldn't matter much. The second screenshot is in the log.
Transcriptor.zip

Screenshots

Did you try having DeadlyBossMods as the only enabled addon and everything else (especially something like ElvUI) disabled?
Nah.

Which version of DeadlyBossMods are you using?
9d767c3

Was it working in a previous version? If yes, which was the last good one?
Dunno.