Reproduced 3/3 times. Was not able to reproduce in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed Regression.
Actual Result: Static Meshes inside Actor Blueprint are no longer visible, and requires the user to exit and reload level for them to reappear (toggling "Actor Visible in Game" also works)
Expected Result: Static Meshes inside Actor Blueprint are still visible
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-170919 in the post.