That's extremely odd - with my Samsung Tab S4, if I pinch zoom in, then draw with the stylus, it immediately starts drawing. I can't figure out how to reproduce what you are seeing. Which display mode are you using?
Thanks,
Mike
UPDATE:
I tested with all four display modes and still don't see any issues. Is anyone else seeing this problem on their device?
Thanks,
Mike
UPDATE:
I tested with all four display modes and still don't see any issues. Is anyone else seeing this problem on their device?