Describe the bug

X-ray effect in circle around player. It is moving as player moves. When player moves for a bit in same place this glitch is gone or atleast reduced to few blocks.

Describe how your minecraft is set up

This does not look like a Bliss Shader bug, this looks like a Distant Horizons misconfiguration. try to reset everything to default and see if this solves the issue.

nah. this is normal.
this is the shader-side "overdraw prevention"
it always sits at 1 chunk less than your render distance. but nobody has a pc strong enough to load minecraft chunks fast enough to hide it.

solution: shader settings -> supported mods -> distant horizons -> max overdraw prevention distance set it to something like 8 chunks or whatever.