After "World is in operation FIXING" all achievements and inventory lost.

Wanted to add a note that this has also happened multiple times to a few-years-old Realms server that a few friends of mine and I play on.

• The first time it seemed to fix itself with no issues

• Right before it happened the second time, I noticed that the server began to spontaneously replace blocks as I mined them. Not one-at-a-time, but in batches. In other words, I would mine 20 blocks and then it would suddenly replace the last 10 mined – sometimes even catching me inside them if I happened to move to a location where blocks had just been removed. Chests also took many seconds to display their contents. After I was disconnected, it fixed itself with no obvious issues.

• The third time it happened, after reconnecting I discovered that all of the chunks that were loaded around me were completely reset to their initial world-gen state. In addition, my inventory was missing some items and because the world had been reset, I spawned in a block that had been previously removed.

• After the chunks had been reset this time, we restored from a backup and it seemed to work. However, two days later it then happened a fourth time and the server became unavailable, stuck displaying the "stuck in FIXING" error message. As I type this message, it is still stuck.

I'm attaching screenshots of some of the error messages we saw for reference.

This is in a freshly generated 1.13 world. I also see that there are at least three duplicates of this issue here in JIRA, some of them reporting the chunk-resetting problem that we also experienced. This suggests that it isn't an isolated issue and it's serious. For that reason, I will not be playing on the Realms server anymore until the issue is resolved for fear of making this worse 😞 I have instructed the owner of the Realms server to submit a support request.

Edit: An additional note that the server eventually came back, but had reverted to its state a few hours prior :/

Hello! We've fixed some issues related to FIXING worlds now. Have things improved? 

Also, if your world gets borked, you should be able to restore from backups. Have you tried that?

As of last night, no - we had a crash again after restoring from a backup. It was stuck in "FIXING" mode for at least 30 minutes.

I've been testing off-and-on today and no major issues yet. However, earlier tonight I did have some odd game tick-lag that occurred suddenly. I immediately disconnected, waited a few minutes to unload the chunks and after reconnecting it appeared to have resolved itself. I'll keep my eye on it.

Thank you for the update kiddailey. I think we're out of the woods now, but we'll keep tuning the systems and try to fix the tick-lag, which we have also seen sporadically.

Let us know if you run into problems again, and we'll have a look.

Just wanted to post an update after about a week or so and let you guys know that everything has been smooth since your last message and we've not had any more issues. Hoping it continues. Thank you!