I dunno how it happened but I died during the boss fight while he was doing the green explosion attack and then I saw my gems pop out as normal when you die but when I revived, they somehow disappeared after using the icoin revive and I didn’t recover them.
I finished up the fight and went around the area I died several times and logged out, went to town, etc to no avail for getting my gems back. Is it just for this boss fight or are there other boss fights where if you icoin revive during the fight, you can somehow lose your gems?