Siri reports error on HomeKit lock requests

Tags: #<Tag:0x00007fc40c4a0e70>

After upgrading to ios 15, I noticed that Siri now says that she cant lock/unlock a door via the HomeKit integration even though the action still happens. She is happy controlling lights/switches as before. It just seems to be a problem with locks. I tried re-adding the bridge, to no avail. Anyone else seen that?