Vector features disappear when using zoom interactions

I suspect this issue is caused by the fact that the PinchZoom, DragZoom and MouseWheelZoom methods generate fractional zoom level values, that are not expected by the code responsible for constraining the zoom range. There might be a way around this by setting constrainResolution to true in the map constructing code. However, I do not know in what file I should look at, to set that value.

..a similar, bud unfortunately unanswered report/question was made in the past → by Dirkozoid.

Figured the correct place to fix the problem. A patch is available here.

Thanks @sano,

I have reviewed and tested your patch. I think this is the correct change to fix the problem you identified. I have committed your change to 7.x-3.x-dev.