Horizontal crosshair

Until today I configured a horizontal crosshair line as describes here: Support horizontal graph crosshair · Issue #20021 · grafana/grafana · GitHub

The described change was overwritten on each update - which was fine.

I just updated my instance and recognised the possibility is gone now. The "crosshair:{mode:“x” setting completely vanished from the .js file.

How to get the horizontal crosshair line back?