Variation in watts during workout

Hi all,

Wondering if anyone can help me. I have had zero issues with my TACX Flux 2 until the last week.

previously, when doing workouts the watts have been really consistent and smooth (images 1-4) and not jumping around much at all.

NOW: the issue
when doing workouts at set watts, my watts on screen are all over the place and jumping 10-20watts without anything changing in the pedals (images 4-8)… this happens throughout the entire ride!!!

I have calibrated on the TACX app before each ride now and hasn’t fixed anything.