Tabulation not visible with Fira Code at 100% in Visual Studio

[frbouvi]

Hi I am using Fira_Code_v6.2.zip under Visual Studio with great pleasure. There is something annoying though as sometimes, tabulations inside a text is not visible (text before and after stich together) when the length of the text before the tab is a multiple of the tab length. And it is only visible at 100% zoom. See the pictures below. My tab spacing is the usual 4 character.
Thank you

Font used:

Magnification 100%, text is abcd(tab)efgh:

Same text, 110%:

Same text 91%

[frbouvi]

In addition when using another monospace font, there is no problem, like in this screenshot:

[frbouvi]

another practical problem of this issue is this one:

when it is seen by the system as:

[tonsky]

I have no idea what might cause this. My guess is it’s a fail on VS part which I can’t do anything about