Draw Interaction removeLastPoint not acting as expected

Describe the bug When enabling the Draw interaction and calling the removeLastPoint function, the draw layer does not update.

To Reproduce Steps to reproduce the behavior:

1. Add the Draw Interaction to the map with type: 'Polygon'
2. Draw a polygon and mid draw, call the removeLastPoint function
3. Observe that the polygon you were drawing does not update
4. Call removeLastPoint again and find that the line segment that was supposed to be removed in the 1st call is now removed.
5. Click on the map again to resume drawing and see that the segment of call 2 is now removed and drawing has commenced as expected

Expected behavior On removeLastPoint call, update the map with the original geometry with the last drawn segment removed

Relevant Code https://github.com/openlayers/openlayers/blob/v6.3.1/src/ol/interaction/Draw.js#L817

[ahocevar]

The cleanest solution is probably to render the sketch point in some way, but with a modified condition you could make the sketch point appear at the last clicked location:

    condition: (event) => {
      if (
        event.originalEvent.pointerType === "mouse" &&
        event.originalEvent.button === 2
      ) {
        draw.removeLastPoint();
        const moveEvent = new MapBrowserEvent("pointermove", map, event.originalEvent);
        draw.handleEvent(moveEvent);
        draw.handleEvent(moveEvent);
        return false;
      }
      return true;
    }

[JackD83]

I think this problematic if I remove the second point of a line or polygon. If I have a style that does not draw single points and remove the second point, the whole feature disappears until I move the mouse. This was seen as error by the users.