We had a similar problem with our 2018 Axis. Had it in the shop twice since it was still under warranty. Thought it was fixed but then it popped up again. It was an intermittent problem and happened when the slide was in. Only a very small amount of water seemed to run in from the slide track area.
I've kept a colored shop rag under the spot where the small drip would appear so I could monitor what and when it was happening.
Eventually we systematically hosed down small sections of the slide to recreated and isolate the problem. One we found the appear ant trouble spot, we just re-caulked around the trim ourselves as raffaelli suggested. That was a year ago. No problem since.