Guys, common!
It's 2020!!!
WTF?!?!!

My Mac runs with all kind of USB sound cards without any problems! So it has to be the FW.

I need help! It sucks like hell!!!

EDIT: I'm experimenting with the second FF plug. no glitches so far.
is it possible that the FF chip has 2 separated channels and one of them is broken?

EDIT 2:
So after a while I'm still getting clicks and pops, here and there...  no total glitches, but anyway - very annoying!

EDIT 3:
no! after a while the tremendous glitches/ dropouts RETURNED!
It sucks!!!

EDIT 4:

FOUND IT:
Aaaaaannnnnd the problem was........
..
..
..
..
Mojave !!!! Bloody OSX Mojave...

Upgraded to Catalana. No more glitches and dropouts and bitcrushers!

EDIT 5:

Glitches/ bitcrusher AGAIN!!!!

mostly when I use the instrument inputs 3 and 4.

no help in this forum.
really annoying!

next time: Universal Audio.

Bye RME!
cheers and peace out!