I've been having trouble with some of the minecraft textures while in the middle of pvping.
This happens when hit by a fire sword/bow, but turns blue/green when poisoned.
Random mobs is also not working.
Also, hostile mobs I attack turn grey when I hit them
Optifine HD U D3
bsprks core w/ Armor status hud and effect status hud
And last is All-U-Want InvEdit
Magic Launcher, bad, use multiMC instead, many different instances, and you can organize them, that may be your problem right there, or try downloading a different version of optifine, show us the logs in the console
Magiclauncher has some problems with some mods, they just don't work with the classwrapper that it uses, such as optifine