Spot bottom anchor issue in v2.5.3

I have a strange problem with hotspot anchor position.
If I choose anchor to bottom, my spot is located at the good position on the pano. But if I zoom in the anchor seems offset to the middle of the spot. So it's no more at the good position...
It was working correctly in previous version.
If I choose anchor to bottom, my spot is located at the good position on the pano. But if I zoom in the anchor seems offset to the middle of the spot. So it's no more at the good position...
It was working correctly in previous version.