When using the Stacked View Mode in the curve editor the font displaying the name of the curve is displaying a placeholder font.
This issue is occurring in Binary //UE5/Early-Access @ CL 16682836
This issue is occurring in Binary //UE5/Main @ CL 18210060
This issue is NOT occurring in Binary //UE4/Release-4.27 @ CL 17735300
Marked as Regression
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-135174 in the post.