Edit: see already reported.
After moving rules from old to new interface the schedules attached to rules don't work. Rules don't become inactive when outside of schedules. I'm on 26.1-4
I use rules to control Internet on kids devices and caught em browsing YouTube outside of hours... Which lead me to investigate what broke and discovered this issue after upgrade.
Will be fixed in today's 26.1.1.
Cheers,
Franco