I have an interface that has worked properly for months. But in the last week or so, its behavior has changed so as to make the interface unusable. To demonstrate the issue with video, I've just made this greatly simplified version of it.

The filter is tied to the element. When I enter a member number, any existing records linked to that member number should display (this still works). When I add a new record and link it to the member, it should be added to the displayed records (this has stopped working).

What the video does not show is that if I look into the table, a new record has been created, but it is not linked. So it's as if the new record is being filtered out before I can even put anything into it. (If that's the case, why is it still letting me select a member - giving me the impression that I've linked the record?)

I did nothing to change the configuration of the base or the interface (which was created with the Blank template). So, is this a bug that was introduced recently, or did they purposefully change something?