Since 1.26 we have observed STRONG FPS problems that sometimes occur when players log in.
From 2000-3000 FPS the server drops to 1-2 FPS! This cannot be.
After several consultations with other (modded) server owners, it can be attributed to the update itself.
If the server then drops below 1 FPS, i.e. 0 FPS, the server crashes.
I don't mean it in a bad way, but you have to release a patch for this. The problem has already been reported by several users.