IDFC
Skeletron Prime
Will this mod be updated to tmodloader 0.9.1?
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That's what it says under the known bugs section.I fixed most of the multiplayer bugs a long time ago. Don't spread misinformation.
As @Krispion said, reinstall Terraria, tMod, and all mods. I've been playing with Grox on a Thorium, Calamity, etc. server and we have had no such issues.