Unable to turn back to "normal" the mode of a layer

Accidentally changed the mode of a layer into an erroneous mode (multiply), and tried to turn it back to the normal mode, but it changed itself again to the previous mode. I’m able to change it to any other mode and stays, unless is the normal mode. Might I have done something wrong?

Indeed! This is an ugly bug :frowning:
Will be fixed with the next update. Unfortunately there is no workaround.