We've been dealing with a wonky AHRS feature on our Stratux for some time as have many others as noted here and on the Reddit Stratux forum.
I decided to try the EU version of Stratux which reportedly has a different GPS configuration. After flashing the latest EU version - https://github.com/b3nn0/stratux/releases/tag/v1.6r1-eu022 - the AHRS seemed rock steady on the ground. After caging the AHRS during the initial phase of our 90 minute test flight involving multiple turns and altitude changes the AHRS remained consistently accurate (given it's inherent limitations).
Can someone else here can give this a try and see if your results are as good as ours? 3 short notes - the EU version does not enable the 978 radio by default, so check the settings page and enable it. Be sure to re-enter your Hex Code as reflashing the SD card wipes the previous entry. iFly wasn't able to automatically detect the Stratux in the ADSB connected device menu when set to <Auto>, I had to select Stratux as the ADSB connected device.