A guess: your loop recorder’s source isn’t set up properly and or your remix deck isn’t set up to take a loop from the correct deck.
Increase the header on your remix decks so you can check what’s the preferred source for each deck and if you use “cue” source for the loop recorder, don’t forget to engage a cue button for the deck you want to get a loop from (I can’t see on the picture what you set, it’s too small).