Mixer faders midi learning doesn't work

[PxBCPG]

Describe the bug I can't assign a midi control to the mixer faders

To Reproduce Steps to reproduce the behavior:

1. Go to the mixer
2. Click on map, the faders and your midi knob
3. In the mapping section, it doesn't map it to a fader but instead to the last midi learning I made on other stuff (eg. on my synth or something else)

Expected behavior

The midi learning feature doesn't work here.

Screenshots Please contact me if needed.

Desktop (please complete the following information):

• OS: MacOS Big Sur

Standalone or Plugin Standalone (didn't tried with plugins)

Additional context None