moderated HTML formatting being stripped from Calendar Event notices #bug

Yusuf Leo Schuman

A group I maintain ( is used to post daily messages to group members. The descriptions of these events are HTML formatted. Beginning 5/27, this HTML formatting is being stripped from notices sent to group members, and from Messages visible in the web UI. 

I have made no change to any group settings. Is this a deliberate change of system behavior? Or a bug?

Join to automatically receive all group messages.