This bug pertains to the Class A GET /v1/chain_id/address/address/transactions_v2/ endpoint.
It seems like on Arbitrum transactions the gas_price field is not the actual price paid but rather the bid price. Is there a way for you to update this? Example transaction i Arbitrum Transaction Hash (Txhash) Details | Arbiscan and the gas_price from the API is coming back with 325255776 instead of 260204621