Shohin Ume question.

[Steven1969s]

I have this Ume and 1 of the branches seems to be having a problem. The leaves are drooping on this one branch and falling off green.
I recently removed the moss covered soil so I suspect that it wasn't getting enough water, but now it should be getting adequate amounts of water.
I was hoping that this would do the trick, however the branch is still droopy.
Should I fertilize it now that it seems a little stressed?
I repotted it 2 years ago and maybe i should have repotted it this year.
What do guys think?
Thanks
Steve

 

[Nybonsai12]

Any chance of physical damage to the branch?

 

[Steven1969s]

The branch is solid, I also checked for insects underneath the leaves but didn't find anything.