My economy balance gets reset when I travel to a world and back or switch gamemodes and switch back.

[Twingary]

Hi, I recently started using PerWorldInventory specifically so I could separate the economies between my creative world and survival world. But I've ran into an issue that when I switch gamemodes and switch back, I will get this issue in the console
[Sat, 5. May 2018 20:27:50 EDT INFO] twingary issued server command: /gmc
[Sat, 5. May 2018 20:27:50 EDT WARN] [PerWorldInventory] [ECON] Unable to withdraw funds from 'twingary': Cannot withdraw negative funds
[Sat, 5. May 2018 20:27:51 EDT INFO] twingary issued server command: /bal
[Sat, 5. May 2018 20:27:53 EDT INFO] twingary issued server command: /gms
[Sat, 5. May 2018 20:27:53 EDT WARN] [PerWorldInventory] [ECON] Unable to withdraw currency from 'twingary': Cannot withdraw negative funds
[Sat, 5. May 2018 20:27:53 EDT WARN] [PerWorldInventory] [ECON] Unable to withdraw currency from bank of 'twingary': Cannot withdraw negative funds

The same issue appears when I go to my creative world and come back to my survival world, my balance goes from $2,000,000 (I gave myself money to test the issue) to -$0 which doesn't make sense.