chinese sweet plum

Hello, My bonsai lost a load of leaves recently when we moved house which I assumed was because it was a change of environment. It has since started growing new shoots again however the leaves keep going brown at the ends and wilting. I water whenever it gets dry and it's in the sunniest spot...

I have a Chinese Sweet Plum that appears to be getting yellow leaves I did have it in another room getting indirect light. see first picture So after some advice I've move it to the kitchen in a window (around 2 weeks ago) that if south facing so as much light as I can. Is this something...