random color noise spot on DNG photos taken by mobile Lightroom app in HDR mode

Hello,

I want to report a bug;

using Iphone 13 pro (iOS version 16.6.1) and mobile Lightroom ver. 9.0.0 8AFC9B/112)

When shooting raw on the HDR mode in the lightroom app on Iphone 13 pro, randomly, but very often on the photo apprear very noisy spots. I attach 2 samples, one is HDR with the spot (lower left corner), one is original file without HDR applied without this spot.

It apprears on all 3 focal lenghts. 

Awaiting kindly your comments

Thank you!

Regards 

Jan