In Grid row height in Universal differs | Thinkwise Community Erwin explained that a smaller grid row height (for example 22px) will be overruled when it is possible to edit in grid because the editor needs the room.

This is really unwanted behaviour because it prevent us in showing better data densities in our applications.

So please make it possible to use smaller grid heights when edit in grid is enabled. It would be fine if just the row that is being added/edited temporary grows in size for the editor functionality to function properly.