If you export images at a lower resolution around 1400px long edge or below, noise reduction is not applied to exported images.The bug never occurs if the images are exported using the setting "export larges resolution possible".
This bug annoys me at least since half a year and I can't believe that it doesn't get fixed although you at Adobe know about this at least since you reproduced it six months ago.
Adobe has never successfully reproduced this issue. Without instructions for successful reproduction we are unable to affect a fix and have left the existing report open to collect more data.
I just tried on three separate Android devices and find it is working on all three (6.2).
Given the low number of reports, I suspect there is something system-specific to your device that is causing the issue.
@Rikk Thats really really sad. I always have it on Samsung Galaxy S8 and Galaxy S20 FE which are pretty common devices.
Since the same bug also occured on iOS I don't believe it's uncommon to happen on Android too. I think it's more like Adobe treating Android as a second class system.