Nether portal issue

Hi community!

I've got some troubles.

All of a sudden, nether portals not loading.

I step in portals, old ones that used to work, or new ones, I've got the purple wobbling effect, then nothing more. Not "terrain loading" or anything. It just wobbles indefinitely.

It worked, then not played for few weeks, and now it won't. Probably had an update in the meantime.