Hey I've been making some paid mc skins if you want me to make you one I have examples if you want! Just dm me on discord for examples! Discord: 🎄Jingle Bret🎄#0606
While I'm not entirely sure it may be server lag because too many things are ticking at once. This happens to me too I removed a few of the mods processes it runs and found that it stops happening. However, it did break the mod.