Floating Reference Position Problem

Hey, Everyone,

I am experiencing floating reference problem.
When I initialize AR world by selecting the reference point, even if I don't move much
this reference point is slowing moving around.
Everything in the scene is static, so there is no reason for AR system to be confused.
Only moving part would be jitters introduced by my breathing or slight natural hand trembles.

But the reference point seems very insecure in the space.
How do you resolve this problem?

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https://forum.unity.com/threads/arfoundation-place-on-plane-unstable.568270/

I found the above thread after I post this. It seems long rooted problem.

=s