I had a ground down spacer and my bars would become misaligned with my stem with a bit of pressure on (not ideal on a rooty bit of downhill) no matter how tight the stem was I swapped it to a lock ring spacer and it’s solid as a rock now,
Have you checked the hoses associated with the turbo for any leaks, you should here a rushing/hissing under load that would be the first place I’d look.
Their online system has been down recently something to do with the cyber attacks so our TNT man says, we’ve been signing paper copies and not their handheld scanners