Used to happen to me all the time.
Likewise here, never figured out what it was. Came and went, just put it down to MS servers.
Congrats, this is the last achievement I need to do but pretty much everyone I know has stopped playing.
Achievement Review/Preview: https://youtu.be/o2HZarpBNDQ
Close the rift leaking void creatures in Icebind Cavern. - Darksiders Genesis
Synthesize 3 types of items. - KINGDOM HEARTS - HD 1.5+2.5 ReMIX
Synthesize an item for the first time. - KINGDOM HEARTS - HD 1.5+2.5 ReMIX