Okay, sounds similar to my schedule, but mine is in a kanuma/pumice mix. I asked about watering because the browning of the tips looks like an overwatering issue. If it’s in nursery soil it could be holding onto too much moisture.
In the yard during even on the hottest of days my water loving annuals only needed to be watered once a day. Bonsai of course needed to be watered twice. However, I’ve either killed or just about killed any plant I had on the benches that were still in nursery cans and thus nursery soil. They just didn’t need as much.
I kept that in mind with my little rhododendron and it did well. Of course there were a few times that I went too far in the other direction and let it dry out too much.
With the onset of fall/winter and your reduced watering it would appear that the little azalea will make it to the repot.
As far as watering goes; this year I set up a rain barrel so I could get away from tap water. My tap water is about 8.4. Rain water measured around 6.4. When switching to rain water I found that I had to supplement with CalMag for my maples.