Thanks for the reply.
After some more testing, it appears that it is the ANNOUNCE function that isn’t working for me. All my rules that use ANNOUNCE now fail to actually announce anything, although they have worked fine in the past. The rules do everything they are supposed to do when they are supposed to except make announcements.
Interestingly, Zones with Chime selected and set to Tone/Voice mode still work perfectly when they become not secure, both chiming and speaking whatever the message is for that Zone. This tells me the wiring and and Elk-73 speaker are ok.
I must be messing up a setting somewhere but I can’t figure out what or where.