Just recently something changed for plugins, and changes these make don’t get updated in modes until you force the canvas to redraw (zoom, move, draw in the region... not pan though).
Here, I try to use one of Astute Graphics’ plugins (it affects many) — I shorten the path, but Ai doesn’t re-render it!

I bet it’s about performance, but come on! These tools is what keeps Ai afloat for many. Please don’t drop the support.