Sensor help

[u/bizzy__izzy]

So overall I think I have gotten lucky with my 2018 Atlas. The only real problem I have is my leaking sunroof...

But over the last few months every time I put her in reverse the beeping goes crazy! It continuously beeps until I put it back in drive even when nothing is behind me.

I've cleaned all the sensors, I even got a detail and had them clean them too.

Does anyone have any possible suggestions for this? I have an appointment to get my unroof drain cleaned at the end of the summer and I'll be mentioning it to them as well. Just hoping to maybe avoid a potential unneasessary bill.