What has happened recently to the Thunderbird calendar? It has become so unreliable. I get some notifications but not others. This has been happening for a while but it's worse now. It started off with notifications for repeated events not working. Now it's happening with new events, too. But it only happens with some, not all. This comes after the search facility for past events was inexplicably withdrawn. I've read other posts on that, but the focus of this question is the unreliability of notifications. Version 128.2.3esr (32-bit).