Hallson Gardens

Showed this in the regular forum and then noticed the vein problem.
tsushimensis

I've seen that on a few of my plants this summer. I have no answer as to why.

Did you by any chance get a light frost in the spring after these leaves were out? I've seen frost and snow settle into veins and then damage strips like this only on the veins. I've never seen HVX turn a leaf brown like that, but I've seen frost damage that looked similar.

Thanks, I was hoping it might be frost damage rather than a virus.