Please help me from pulling my hair out.

We have been a Tapo camera household for 3 years now. Familiar with all the usual settings, frame rate, power line frequency etc. We have 3 internal cameras and 3 external cameras.

Added the baby monitor, set it up as normal. 1x view, no issues. 2.5x view, horrendous banding that moves slowly top to bottom.

Double checked power frequency and frame rates. All good. Moved another internal camera (C110) into babies room - picture absolutely fine.

It’s almost as if the frame rate for the 1x view has been set independently from the 2.5x view.

Factory reset, still the same. Latest firmware - 1.4.2.

ONLY does this when the (LED) lights in the room are on.

Anyone?