Strongbox minimap icon missing after re-entering map

In the new patch 0.1.1C GGG added minimap icons for Strongboxes, but these minimap icons disappear when teleporting to the hideout and going back to the map again. All the other league mechanics still retain their icons.

I did try to test if it happened because the strongbox wasn't identified, but even when it was identified the icon still disappeared when re-entering the map from the hideout.