I checked my 1 plant yesterday and it has tiny slice or white spots on 2 of the leaves and I was wondering what are they I have a video if you need to see them
I second the calcium diagnosis. maybe try some liquid cal-mag to fix it. Adding organic amendments will take more time to hit the plant than synthetic
That looks a bit like calcium deficiency to me. Did you check the underside of the leaves for pests? Some pests can cause similar damage.