I had the same experience when dealing with IONOS when I encountered a problem a while ago where the databases of managed websites were suddenly empty. As I couldn't determine why, I contacted the IONOS support, which after some back and forth admitted that they were having a database related incident going on and that the databases will get restored later on. Indeed, a few hours later the databases suddenly weren't empty anymore and contained the data they did contain before. During all of that their status page stayed entirely green as well.