Function signature tooltip doesn't update when moving the cursor among function call parameters

Say you have a function call `DoSomething(int a, int b, string c)`. Then you try to call it with `DoSomething(a,b,c)`. Normally, in the call, if you put the cursor after "(", then press "Ctrl + Space", you see a tooltip with the function signature. If you use the keyboard to move the cursor to the right, normally, the parameter, where you are at, should be bold in the tooltip. However, this doesn't work.

If you re-enter a ',' the tooltip updates to the right position.

PS: sorry for cloning an old issue with the same topic ... it cloned the Fix Version/s too, but I can't clear it