I keep seeing something odd with Shatterspike Mantle that surely is a bug.
I have ability timers enabled in on my ability bar and the timer for Shatterspike Mantle goes away whenever I leave combat. I still have all the spikes coming out of my back, but there are no numbers on my ability bar. If I stay in combat, then the time ticks down from 20 to 0 as expected.
I did in fact see the Shatterspike Mantle timer count down to zero when not in combat once and luckily it was while recording video footage for this bug report. In that case the cast of Shatterspike Mantle killed the enemy right away and so I might have left combat before the UI timer even noticed.
In the video you can see the following fights.
1) The bug. I start a fight and as soon as the enemy dies the Shatterspike Mantle timer disappears. I still have spike coming out of my back.
2) Long combat. 0:30s into the video I start another fight and the timer displays as expected.
3) One shot. 0:56s into the video I see enemy isn't dead and I cast Shatterspike Mantle again, killing the enemy. The timer keeps going even though I'm not in combat.
4) The bug again. 1:20 into the video I kill more enemies.
https://youtu.be/KcS44HCy4Ts
I disabled all my addons while I captured the vdeo.
Ngā mihi,
Eurymachos