I’m playing on the PS4. If you acquire any amount of the burst gauge and then save and return to the main menu, upon returning, your burst meter is reset to 0. This is pretty frustrating esp. in a legendary or mythic dungeon when you need to save and quit the game for whatever reason (sleep, real life, cat on fire, etc). The workaround is to go out and just start fighting guys again to rebuild it but this is tedious, and when you’re in a dungeon even more annoying. I’ve had this happen a few times where I thought I’ll clear the dungeon up to the boss, have my level 3 burst ready, then quit and get ready for bed and tackle this tomorrow. I reload the game and I’m back at 0.
Not a big deal in the grand scheme of things, but I figured I’d let you know esp. if it’s an easy fix.