I am also having this issue. I have had to use MCA many times to delete chunks that I don't care that much about in the area of this glitch. It fixes it sometimes but I just had to stop playing because its happened again and I'm getting tired of figuring out what chunks to delete to fix it. Thankfully it hasn't affected my main base chunks. It seems to affect areas that have loaded from previous versions that you then go load more fresh adjacent chunks.
I am also having this issue. I have had to use MCA many times to delete chunks that I don't care that much about in the area of this glitch. It fixes it sometimes but I just had to stop playing because its happened again and I'm getting tired of figuring out what chunks to delete to fix it. Thankfully it hasn't affected my main base chunks. It seems to affect areas that have loaded from previous versions that you then go load more fresh adjacent chunks.