Elemental Turrets occasionally adapt the rotation of Adjustable Turrets but only the rendering of the model is affected. The spell direction is unchanged. Once the Adjustable Turret is no longer visible, the Elemental turret is rendered with it's intended rotation again.

In order to rule out any mod incompatibilities only Curios, Ars Nouveau and Ars Elemental have been installed. With GeckoLib installed the same issue appears so it's most likely safe to say that it is not related to that.

Screenshot of the Elemental Turret adapting the exact same rotation of the Adjustable Turret, despite normally facing another direction:

I have been able to reproduce this issue also on 1.21.1, I'll update the title accordingly.