Is your feature request related to a problem? Please describe.
When other WA does CastingBarFrame:UnregisterAllEvents() (probably to disable default cast bar), overlay latency is broken.
When I run LunaUnitFrames, overlay latency (just) for cast are broken - is fine for channel.

Describe the solution you'd like
Rework latency timer so it works same as Quartz, this gave me correct values every time.

Describe alternatives you've considered
Keep using Quartz ... as I want to keep using Luna
or trying to fix Luna

Additional context
I would like to use cast bar made by WA, as that is easily customizable

WotLK

the problem why overlay does not work is because WA renders cast/channel before setting cast_start
when Luna and other WA are disabled, cast start is triggered before rendering latency
correct order:

Luna enabled:

ok, the channel working + cast broken is because of combination of Z-Perl+Luna, I can turn off Z-Perl and have it fixed
still, it would be nice if it WA was working as good as Quartz latency is