Hello! I recently moved (about 7 months ago) into a home with a beautifully established star jasmine arbor. I've recently noticed some yellowing in the middle of the canopy and I am looking for some advice. (please note, there are some brown spots due to pest treatment that ultimately was too intense for the plant that was about 3 months ago and we are still recovering)

I need advice on what to do...I think I was overwatering recently - due to temperatures over 100 degrees for multiple weeks. Now, I am afraid to water or treat. What should I do?