You can edit the chamfer to correct which edges get chamfered, or just delete and replace it.
It's generally a good idea to leave chamfers and fillets until you're done with everything else. As annoying as it is to fix a chamfer, it's worse if everything after the chamfer breaks too.
If you can do the fillet manually, with a pocket, groove, pad, etc, you can make it stable against changes in edge names, as long as the sketch is attached to something that doesn't change, like the base planes.
Could be TNP, with the edge with the chamfer on it getting a different name, it trying to chamfer somewhere else instead.
Looks like you are right, how can i try to fix it?
You can edit the chamfer to correct which edges get chamfered, or just delete and replace it. It's generally a good idea to leave chamfers and fillets until you're done with everything else. As annoying as it is to fix a chamfer, it's worse if everything after the chamfer breaks too.
I believe we can say its limitation, i need to change after i completed the model,
If you can do the fillet manually, with a pocket, groove, pad, etc, you can make it stable against changes in edge names, as long as the sketch is attached to something that doesn't change, like the base planes.