Possible race condition after server outage
Yesterday (13th, last day of the test) at around 10 AM CET both the game and the website couldn't be reached for a brief moment.
Afterwards talking in Global and Guild chat was no longer possible (Local chat worked). Guilds were not displayed properly in the tab (only one person even when multiple were on), some people like @Darnel couldn't create a party, the shield icon for towns no longer appeared on the map, enchanting items failed (clicking enchant started the process but upon finishing, no money had been taken and the item wasn't enchanted), dead trees showed the wrong prefab.
I had to leave, so I couldn't test more.
Since these worked before and there hasn't been an update, it's an indication of a possible race condition. It might be worth taking a look into the logs.