Hi guys, I just installed the FPVModel X-Racer v3.1 running on Betaflight X_RACERSPI v3.0.0 on default settings. It only has Acro mode, when hovering the quad just seem to yaw right on its own. Reminds me of Naze32 Rev6 on Angle/Horizon mode. 
I tried to reduce P gain on Yaw just out of curiosity, no changes.
Tried to increase I gain on Yaw, no changes.

I've not changed filters, not sure how that works. 
Anyone had similar issues??

check what's happening with yaw input in the receiver tab. It should be on 1500us. Possible that your transmitters yaw center is a bit off?

I had to add some yaw deadband because of yaw jitters from my radio.

Hi guys, yaw was at 1500. But i've reduced it a little to compensate, seems fine now so I'm just going to leave it as that. Thanks!