2.21 event capture program rule issues

Hi, I just upgraded an instance from 2.20 to 2.21 (latest build), and I’m now having some difficulties with event capture program rules. I’m using a custom form, and in 2.20 fields were disabled according to the program rules as expected. After upgrading to 2.21, fields are not disabled, though the message pop-up appears if I try to enter something in the fields that are supposed to be disabled. I.e. it seems that the rules are “interpreted” correctly, but fields are not correctly disabled.

Does anyone have any experience with this issue? Are the fields still supposed to be disabled in custom forms in 2.21?

I also experience another strange issue in 2.21: The “comments” section + the Save and Back buttons appear twice.