Strange pattern at the bottom when using full sensor UM4.6EF

Hello everyone, I'm new around here so my apologies on advance if this matter has already been discussed.

I recently bought a used URSA Mini 4.6k EF.
Everything seemed fine until I noticed a strange pattern showing at the bottom of the clips when shooting with the full sensor (no window). The pattern is also shown on the camera's screen. The pattern gets bolder on higher ISOs.

You can see a screenshot of a clip I took with the body cap on:

https://imgur.com/WjnITY7

Is there something wrong with the sensor?

That looks quite nasty. IS that on multiple clips? with cap on?.... Try sensor calibration.

What specs this you shoot this.

The pattern at the bottom is not normal

I'd contact BMD support about the issue. Definitely not normal.

Is there something wrong with the sensor?

Something's very wrong there. You should get in touch with BMD service.

JB

Thanks for your responses, this is definitely something to worry about...

That looks quite nasty. IS that on multiple clips? with cap on?.... Try sensor calibration.

What specs this you shoot this.

The pattern at the bottom is not normal

Yes, that happens on multiple clips.
The screenshot is with cap on, without it the pattern continues on screen no matter the lens it has.
Tried sensor calibration and it's still there.

I shot this at 4.6K Prores 444, 23.978fps but it happens on any setting that uses the full sensor.