incorrect billing

Please help as the credit amount deducted from the basket amount is calculated strangely. The problem clearly relates to situations where the product has tax enabled (when I disabled the tax on the product, everything worked correctly).

For example, I have a credit of 300, and the basket amount is 350.46. Instead of reducing the value by 300, the wallet reduces it to 284.93, and I need to pay an additional 65.53. I’ve tried changing the Rechargeable Product Tax status settings to all possible combinations, but it still calculates the same way. Is there anything else that can be done?