[Graph on parent] Subpatch window closes when typing underscore into an object box

[jamshark70]

Plugdata 0.9.2, Ubuntu Studio 24.04.

1. New patch.
2. Create [pd display] inside it.
3. Open the subpatch.
4. Properties -> set graph-on-parent and hide display name etc.
5. Create an object box and type [route timer timer_next] into it.

The subpatch window closes...?

I also saw plugdata crash once in this case.