Based on the total number of issue reports to this forum and our IRC channel I'm calculating this problem is impacting ~0.0009% of the users running LE11 images. That level of "failure" is excellent. Of course we would prefer it to be 0%, but as with most things in life 100% perfect is never realistic and/or would require so much time/effort and testing that some combination of "no fool would ever volunteer to the project" and "sorry, too busy testing to make releases" would apply. At some point you have to call time and cut the release. You are all welcome to roll back to something earlier if that works for you. You are all welcome to go play with Kodi on Android or Windows or .. some other distro too; if you feel we're doing such an intolerable job.
In reference to patches; the "service: Fix hidden service with wrong passphrase" patch is adding support for flagging an invalid-key, not resolving an issue where invalid-key is being flagged which is a subtle but important difference. IMHO the description contains all the right keywords to sound interesting but I don't think this is relevant. No harm in testing it though.
As nobody on staff can reproduce this .. someone needs to start sharing connman and iwd debug logs. They will be verbose and sizeable but are often quite human-readable. The issue is likely in the comms between connman and iwd.