Depenting of the position that i'm looking in the screen, some parts of the numbers in the screen disappear, and i'm not using optfine, cause it is famous of doing that things.

Version:
RFTools: 5.11
Forge: 12.18.1.2024

Screenshots:
http://imgur.com/a/hqY1U

Do you have optifine or anything other client-side mod that affects rendering installed? Never seen that before

Nop, i don't have any mods that changes rendering, but recently i disabled the bar and it stopped doing that

The bar? What bar?

There is an red bar at the background of the numbers, and you can disable that bar in the screen