Hey @Klainex
It seems you bumped into an elusive and rare bug introduced during the building optimizations update. Sometimes, the server fails to render a particular structure and whoever is in the nearby space of that building is affected by the status you mention in Step #2. This problem is temporary and gets resolved once the server has undergone a full restart cycle.
Our team is aware of it and looking into it, but due to its elusive nature it’s very difficult to find a reliable repro case for it.
Thanks for the feedback.