Can you share some further info :
1. What version of Photoshop are you using
2. What Operating system
3. How exactly did you make the constraint
It is working here on Photoshop CC 19.1.2 Windows 10.
Edit - I made the hole constraint above when making the mesh. Adding a hole constraint later via path or selection does not appear to be working correctly. The only way was to Edit Source and add the constraint that way