Egdesrf surface not joining well

I’ve been using lots of sweep2 to make surfaces to have tangent continuity with adjacent surfaces,
but now using more edgesrf.

I don’t have sample file now but I ran into situation where the surface made from 4 curve looks pretty good when not joined, but when joined the corners of the surface gets crushed/dented.

I’ve purged history if that changes things, but no difference, and had to do couple of surfaces using sweep2 and patch.

Is there anything with edgesrf that needs to be considered when using it?

Is there problem using edgesrf with an edge that is split using splitedge?

I wish I kept the file, but overrid it… I’ll post if I can reproduce it.