We identified the source of the bug you described, and we patched it. Being a client-side change, you'll need to update the app to reflect the new changes (we just submitted it to the stores, but it will take around 24 hours to be available to download). In the meantime, we recommend to not interrupt a PvP Match to avoid encountering the bug, which happens only when restoring an ongoing PvP battle.
Thanks again for letting us know!