adjust a mask creates error on save

I edited a tif file of a person, created three mask and export it as a jpeg. Reopened in lightroom cc then opened one of the masks and adjust the hue using fine adjustment in the color section for the mask. Closed the mask. Then exported with previous. I get the error  "There was an unknown error. (1)".  If I resave without doing any adjustment, it works. If I update the color temperature adjustment in the mask, it works.

[moved from bugs to discussions in accordance with the community rules - Mod.]