What's going on with rendering?

Hi. just spotted , that in some positions, character becomes transparent.
Anybody knows what is it?
Why in some camera position, character stops rendering?

Here is how it’s happening:

This is our character, everything is okay:

Here we catch that momen, where hi disappeares:

But physically he is still here, his colliders are okay:

Clipping Panels are on minimum value.
Please help!
Thank you!

Solved it by switching “Update when Offscreen” parameter.

I think will affect on performance, but anyway it’s resolved my issue C: