Zombie Pigmen angered for no apparent reason

This is a very annoying bug that happened on my minecraft java 1.14.4. I was deciding to go to nether, because I hadn't gone there in about 250 in game days. I built the portal, went in, but, some zombie pigmen were very angered with me. I went up to other ones, but they got aggressive to for some reason. They killed me, I came back, but before that, something weird happened. I was caving to escape, and I just got stuck inside a block! I literally couldn't do anything! Myself and all the other mobs (Ghasts in the background) were stuck, but the pigmen weren't? I'm kinda confused. Sorry I couldn't take footage of this moment, but please fix this! I just lost all my stuff due to this! 😞