I have a problem extruding curved surface.
When a surface included curve and we decide to extrude it further, the curved segment will generate a new curved surface.
It doesn't take long after that the solid starts including some naked edge and will become unusable as a solid.
Yes, we can unjoin surface, delete one of them and rejoining the model, but this it incredibly time consuming on complex model.
Here is a video of the operation.

https://recordit.co/QrxsG57tks

1) Create box
2) Filet edges
3) Extrude top surface
I'm using Beta V5.0 2023-APR-08