In the unit panel in the bottom middle of the screen, my scv’s or drones or probes have the images but no borders around the units to differentiate them. At different points in the game, the entire panel glitches out and won’t even show the proper number of units in the unit panel.
Same problem here, but it looks like a new update happened and the problem is no longer there. Maybe they reverted to old patch.
Information on this can be found Here.