When I first got my fm3, I was excited to use the USB interface (maybe because of pod XT day nostalgia). But I just couldn't record multiple guitars that were properly on the beat. I'm not the most perfectionist player in that regard, but something just felt wrong.
I assumed I was getting too rusty.
Eventually started using my interface again. All fine. "Rust is wearing off", I thought! But I switched to FM3 interface a while ago for some recording usage and holy moly -- again the "rust" was back.
Then I tested back and forth and it became obvious there's something off here.
So I'm glad the issue is getting attention it deserves. Will be using my dedicated interface till there's major firmware addressing this issue (well, for fm3, if it happens).