LaTeX-Workshop: Wrong column number from chktex (Tab) + character/byte skipping in actions

Hi,

Here is the interesting screenshot showing two issues:

If I got the things correctly, chktex detected a common $...$ -> \(...\) TeX vs LaTeX thing starting at 13th character but it reported column number is 21 (because of its own setting TabSize = 8). When I remove the leading tab character, this is what happens:

As you can see, codeaction suggestion is shifted by one character to the right-hand side, and clicking it does not make any change. The root cause for the misplacement is the character č in UTF8-encoded input file. Once I remove it, codeaction suggestion is placed correctly and the action successfully replaces $P(x,y)$ by \(P(x,y)\).

So, to conclude:

1. [UX suggestion] Could LaTeX-Workshop consider TabSize = 8 setting from chktex?
2. [Bug?] Is it really true that non-one-byte-characters are the root cause of the presented issue and can that be fixed?

Kind regards, Ivan