How big a problem is a prechamber leak?

[RayG]

I noticed yesterday that there are small, bubbling leaks around the base of two of my injectors. The bubbles were popping up at the outside threads of what looks like an insert that the injector threads into. (Is that the collar?) The injectors themselves appear dry, so I do not think it is a leak in the return lines. I harvested a photo from an existing thread and put in an arrow to show the origin of the leak.

A search for "prechamber leak" shows lots of threads on this problem, removal of the collar and the prechamber, etc. But I got little indication on how severe a problem this is. Since my engine currently runs fine, can I just ignore this for now or is it a problem that is going to worsen or become harder to eventually fix?