I am using Feather client and using hypixel pit pack and i will try turning on smooth font , i dont think feather has disable HUD cachingwhich client are you using?
what texture pack are you using?
try turning on/off smooth font
disable HUD caching if you're using lunar client/badlion client
Let me turn off my texture pack and then see if it is my modeither one of ur mods or the texture pack is causing the issue