I remembered → Bug: PhotoLab shows the clipping overlay RGB values instead of the ones from the image - #12 by sankos (also follow further down) – and did some experiments.
But as my screen is set to AdobeRGB, I didn’t expect to get any clipping with the export to JPEG-format. Then to my surprise, I got clipping when I chose sRGB colour space, while there was none with AdobeRGB. – To countercheck, I tried the same from within PS with same results.
And yes, it’s the red tones …