Tags Folder - message list unexpectedly empty. Wierd interaction with Quick Filter.

I just learned about the new Tags folder mode and enabled it. When I select a tag folder, the message list pane is empty. At the top it shows the tag name and the number of messages. Toggling the Quick filter from enabled to disabled causes the list of tagged messages to appear. If the quick filter was disabled to start with, it must be toggled On then Off to reveal the messages. Enabling the quick filter after this doesn't cause the message list to disappear. Entering any search text into the quick filter causes the message list to disappear. Deleting the search text causes the filtered message list to appear for a split second before it disappears again. Each tag selected requires the same toggling to reveal the messages. The quick filter doesn't I have tried starting in safe mode and the behaviour is the same. Version 115.7.0 Debian 12