Completing @for with ( enters the wrong completion item

[davidwengier]

The right item is hard selected, but that's not the one I get 🤷‍♂️

[Peter-Juhasz]

@phil-allen-msft You can clearly see on this video how unstable completion is (and I don't mean the actual issue described here, but in general). Items appearing, disappearing, at one point even the whole list gets reset/empty - like there would be no "completion session", but all completions recalculated for every keystroke and different sets populated asynchronously.