Once in a while (only when I start typing fast), Zellij exits it's fullscreen mode, so I'd see all of the panels. And changes it's order (as if I did the command NextSwapLayout).
Additionally it seem to send to NeoVim the squence 13;129u.
I have no clue as why that happens, and it is SUPER annoying
If someone maybe has some insights to why that may happen, I'd love to know
After a bit of tinkering around, I've noticed it happened because I hit the \ key and the enter key simultaneously. I noticed it happened because of kitty.
After upgrading kitty from 0.37.0 to 0.39.1, I can safely say the problem seem to be fixed.