Loss of boost and possible fuel cut?

I've changed the tune, gone to stock, a different stage 2 tune, back to what I have now, nothing changes.

No new codes. Afaik the coolant temperature sensor is fine. Haven't had any issues with that or any odd temperature readings.

Quick update that could provide additional clues as to what may be going on. When I'm on a rough road with a lot of bumps, or a dirt road, I get occasional misfires. The engine runs noticeably rougher. As soon as I get on a smooth road it stops. Am I correct in thinking it might still be the throttle body? In my mind the butterfly valve is just bring shaken and is causing random misfires.

Okay, so I just got back from being out of town. I found a loose butt splice on the signal wire for my MAP sensor. I got that secured and replaced with a new one, and that solved the misfire over bumps issue. I ended up needing a new battery as well, so that's replaced and the terminals on that are all good. No engine codes pending or present. However, I do still have the loss of power at around 5k-6k RPM. I'm at a loss of what it might be still.

Yes, I've tried a new MAF sensor and have cleaned the one I have now with MAF sensor cleaner. On your advice, I went ahead and replaced both coolant temperature sensors and that didn't help either.