I’m not sure, if it is a bug or something, but exported photos look a lot darker, if I use anchor 100 value and pixel shift motion correction. Photos are fine, if I set motion correction off. Anchor 99 produces similar darker photos already in the editor and there is a big difference between 99 and 100. Editor photo thumbnail also seems to have matching issues with the processed photo in some cases like this. It looks darker or brighter.
Windows 7 64-bit, Rawtherapee 5.8 (and 5.6), Pentax K-1 Mark I (PEF-files)