At large file size, realm is corrupting & unplayable. After two years, this is unacceptable.

This report may be unconventional.

Our realm is 4.2 GB, about 28 months old, a survival server with some  tp command blocks, and we allow duplication.

We've faced major issues in the past, though an update always fixes them even if after weeks of unplayabiltiy. We had just defeated the dragon for the who-knows-what'th time (at least more than 10) and had gone through the fifth or sixth overworld end portal when issues began.

-Players couldn't load in, each time told they were unable to join
-Players who made it in would find their items gone or their mining obsolete, would be kicked shortly
-Players couldn't make it into the End or Nether
-Eventually players who made it into the realm witnessed entire chunks misplacing and erasing, with water pouring down into the void

We're essentially facing a realm apocalypse. After spending 200 USD on this realm and wanting to not have to reset, we're forced to because of how unstable this is. This is unacceptable.