Good news! The team have found the cause of the issue and fixed it!
Bad news! Unfortunately, this requires a client update so that means the fix can’t be released to the live game until version 3.0 releases
Basically, the issue happens when the gems are exploded while gem matches are being resolved, the exploded Gems aren’t being counted under those specific conditions.
There shouldn’t be any other Weapon affected by this.
Thanks again for bringing this to our attention and thank you in advance for your patience for 3.0 to be released