(made on Windows 10 21h2, i7 8700, GTX 1080 TI, SVP13 (VP17 was mentioned in the end))
I made that Blur effect for the text using parent/child and comp mode trick (attached my setup aswell if u want to use this) (no offense, just the game [Rise of Nations] about conquering the world)

As you can see i made text effect with blur behind it (used Vegas Defocus and Brightness & Contrast effects)
Doesnt seem to be visible when i save it as snapshot
Upon rendering the text without the brightness effect i get these text edges which ruin the effect
zoom on the image to notice

same issue appears even when u dont apply any effects, just text

also the setup:

Does anyone know how to get rid of the White (any color is a bit visible aswell) edges when doing such things? pls halp🙏
(btw im on sony vegas pro 13 and i did the same things on vp17, same issue)
also if u have any questions or need more elaboration ill try my best, srry for my bad english