Night Mode BLF lights up when placing a call in Park

I have FreePBX 12 system with about 22 extensions. I setup a button for night mode using feature code *280. Parking like code is 800 with 10 lots. Yealink T46G phones. When ever a call is parked the night mode button lights up and turns off when no calls are parked.

If I activate and then deactivate night mode the BLF stays off until the next call is parked.

Users say that sometimes when they turn on night mode it turns off by itself.

I have another system setup in a similar way but does not have this problem. I compared the settings with that other system and they are setup in a similar way.

Appreciate the help.