What steps will reproduce the problem?

1. Heroic raid with ~23 people
2. Occurred every pull while in all 3 rooms

What version of BigWigs are you using? (Stating 'latest' is not useful)

v119 (2018-10-03)

Do you have an error log of what happened?

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

Bars can't go to negative values. Show a screenshot.

That's not a minus, that's a tilde.

https://en.wikipedia.org/wiki/Tilde

This symbol (in English) informally means "approximately", "about", or "around", such as "~30 minutes before", meaning "approximately 30 minutes before".

I've improved wind and beam timers more in the latest alpha, and will keep an eye open for even more improvements. Closing this for now.