Are these small brown dots and edges on my Crowea exalata a concern?

I bought this Crowea exalata about two weeks ago and from my memory it looked perfectly fine and healthy. However, I just checked up on it and I noticed these tiny brown dots, spots and edges on the younger leaves; the older, dark green leaves don’t show any of these symptoms. Do I need to be concerned about this?

I’ve had really bad luck with growing natives in the past and only one is barely getting by now. They all seemingly succumbed to a disease of some sort causing them to get brown spots that eventually crisp up and kill the entire leaf, but I didn’t know what to do about it. I’m just worried this plant has got the same thing and I want to take action before I lose another native beauty! Thanks for your help!