Text graphics randomly disappearing from timeline in project. 23.1.0 (Build 86), Windows 10 Pro

Hi Everybody,

Text graphics seem to be randomly disappearing from my timeline. I can't rule out human error 100%, nor can I reliably reproduce the problem. I'm using 23.1.0 (Build 86), and have never had this happen before. My project is very simple, apart from having lots of graphics with text layers. There is always just one text layer in the graphic, nothing complicated. I am positioning them with presets (vector graphic position). There are no effects or anything else on the layer, just basic styling from the EG panel. There are many sequences in the project, but all are simple like this, nothing nested, etc. 

As I'm working it seems like some of my graphic events are randomly disappearing from the timeline.  For example, I'll add a few to the beginning of the project and continue working down the timeline. But if I go back to the beginning, one or more of the graphics events is just GONE. At first I thought I was getting sloppy about holding down alt when I would copy a graphic, but yesterday I was VERY careful when editing, and double checked that everything was OK when I saved and closed. Today I opened up the project again, and am 100% sure that some of the text graphics I inserted yesterday are gone. There is no rhyme or reason to it, and I can't reproduce the problem, unfortunately.

Is anyone else having this problem? Any idea what might be going on? As I said, I can't rule out human error 100%, but I'm 99.9% sure that there is something fishy going on.

Thanks in advance!