Damn, mine is getting worse. I'm so torn, I had another keychron before this one and it was really great. The wired an bluetooth connection options is basically a must because I have two computers (PC an laptop).

I'm having a similar problem, but the d key works maybe....3/4 of the time now. Trying to go through their support has been a huge pain. I sent in a video with their tester which dropped one "d" in ten over maybe 30 keystrokes. They said it wasn't enough and suggested I press the key in the middle of the keycap (lol). Are you having any luck?