Kovid just rewrote the pseudo-selectors code, and since it is new it might not cover everything yet. I am sure this will be fixed soon, in the meantime I guess you can use the old version.
EDIT: Remembered seeing this thread:
https://www.mobileread.com/forums/sho...d.php?t=257296
Same problem. It should be fixed:
https://github.com/kovidgoyal/calibr...54b8dbe69bcf1a
Just wait until the next release, should be this Friday (as usual).