What were you expecting to happen, and what actually happened
Expected: Open gold chest with exactly 180 gems in inventory
What happened: Unable to open chest, pop-up occurs prompting me to purchase gems because "You require 0 more gems
Occurs when you have exact gem amount for gold chest
Step 1) Acquire Gold chest after battle
Step 2) Have exactly 180 gems in your inventory
Step 3) Attempt to open chest in the after battle screen
Step 4) Be met with pop-up to buy more gems.
Good news is you didn’t spend 180 gems opening a chest - Up to you of course, but this is not great value spend of gems (which become hard to get after completing the play-throughs)
Also, since you found the forums - strongly consider joining a guild for more tips and tricks & a place for new players to ask questions and get advice