Lockboxes are bugged

Lockboxes spawned Mosnters, they were all killed,
after that loot didn't drop.

The Lockboxes stayed there, when clicking on them it says: This chest is locked.

happened in T17 Map with the Ambush Scarab of Containment, Ambush Scarab of hidden Compartments and Ambush Scarab of Discernment.

Can confirm on standard on T17 map.

T17 with ambush and lockboxes scarabs (~20 added lockboxes). About 2/3 of them stayed locked with all enemy killed.

THe same thing happened to me today at T17 Citadel.

One of the chests opened once. Got stuck after reopen.