So I had my car coated by a shop that uses all Fenylab products. I have a bottle of their quick detailer, and I was noticing a similar issue on my car after washing it. A little bit of soapy water would get under the top and create white water spots that wouldn't wipe off. Quick detailer to the rescue... Sprayed on, wiped off with microfiber.
https://www.feynlab.com/product/feynlab-detailer-v3/