The hotfix for this firmware was released (28.12), ST has updated the first post.
However, as @jkp pointed out there’s another pending issue with the platform where unused device handlers can cause the pairing to not complete the device creation through due to a bug in the platform. You can find more details about it here: FAQ: My lock/device does not pair or appears to pair but it won't show up in the mobile app or IDE - stale DTH
This only impacts device handlers which haven’t been used in a while, so generally it’s good practice to remove unused handlers from the IDE and only keep those in use by devices.