Dimming only works on laptop's screen, additional monitors are unaffected

[Miki800]

I have 2 monitors in addition to my laptop's one
when I click on ALT+PAGEUP or ALT+PAGEDOWN it only effects my laptop's screen, the screens of the other monitors are unaffected.

Using Windows 10, Build: 18363.1256
Flux version 4.118

Is this bug a known issue? is there an ETA on a flux version with a permanent fix?
is there a known fix or a temporary workaround to make it stop?

EDIT:
I just restarted flux and it fixed the problem, but this is a temporary workaround (it happens quite a lot), I don't want to be expected to do that manual fix every time this bug reproduces, is it tracked? if not please consider this a bug report.