I have a very rare armored environmental suite that does not place the "Activate Environmental Suite" power in the proper add on tray slot. Opening the powers menu and dragging the power to a spot on the regular tray bar will activate the suite so that still functions. Same suite on Hollodeck places the power in the correct spot. Also the environmental suite handed out by "boldly they rode" Places the power correctly in the add on tray slot. So it seems Isolated to confirmed a Very rare armored environmental suite [RegHP] [temp] [Ene] from the tholian reward boxes. If I had to guess I'd say check the tholian reward suites to see if they all do it.
Same suite on Hollodeck places the power in the correct spot.
That would indicate that the problem is not the suite itself, but rather the instance/mission you were in at the time it didn't work. Can you tell me where you were when it didn't work? I ask because I just noticed that I cannot activate my suite on Nukara Prime. Have not yet tested it elsewhere, so that is going to be my next thing to do.
Hollodeck as in the other server. I wanted to check if it was a preexisting bug or was something likely introduced in the new patch so I checked it on the live game version, where it functioned normally. On tribble I tried it in multiple spots received the same non binding error.