There's a known issue reported by Microsoft and Unity where the following Unity versions cause flashing and strobing effects on the Hololens 2:
- Unity 2020.3.21f
- Unity 2020.3.22f1
- Unity 2020.3.23f1
You can find the issue here on Github. We identified that this can also cause offsets when tracking targets with Vuforia Engine. Microsoft stated that a current workaround is to upgrade to the newer release of Unity, 2020.3.24f1, which fixes the issues.
Technical Community Manager