If it is catching the Crown what would the cause be?
The simplest reason (Google for Occam’s Razor) is that your tyre is bigger than the free space available when the fork is fully compressed.
So if you have a fairly large tyre, perhaps with chunky tread, it may be right at the same point as the “reasonable assumption of tyre size” that the fork designer made.
I have a “frankenfork” Rockshox that does this, but in that case its because it has a Judy crown and SID lowers which makes the free space on full compression a bit smaller than if it was a SID crown. I did quite a lot of riding with it, which was fine when I rode that bike a lot because I got used to it. Once it became a more occasional ride it would do my head in and I ended up swapping the fork.