Flux not working on second ext. monitor, but fine with first

[domcario]

Products being used:

Docking Station (requires DisplayLink manager): QGeeM 16-in-1
1st Monitor (flux works) (connected via USB-C to dock): LG 27UK850
2nd Monitor (flux doesn't work) (connected via : Acer XF270H B
Laptop: MBP 14" 2021 (apple silicon)
Screenshot attached with DisplayLink menu bar app info

I also run Amphetamine + Amphetamine helper for clamshell mode since this setup runs 99% of time in clamshell mode.

As the title says, my 2nd monitor doesn't respond to F.lux OR Night shift at all.

Regardless, if the 2nd monitor is connected through HDMI or DP to the dock F.lux & Night shift don't work....BUT if I connected the 2nd monitor to my MBP via HDMI, then F.lux & NS work.

***Edit: When the 2nd monitor is connected through HDMI, it disappears from the DisplayLink menu bar app...Interesting.