texture packs even if up to date cause some letters to disapear

it does not matter what texture packs you use.. it seems to be the cause of having multiple texture packs.. despite there no reason for them to be causing it, a couple letters, mostly the letter “f” disappear in your chat, or anywhere on the normal minecraft UI, this was not originally an issue as far as I'm concerned, only way to fix it is if you disable a texture pack, save changed, and re add the texture pack (re adding is not necessarily)