Why Customer Credit Limit in Collections Form show incorrect value when we have more than one curren

We have a Customer with one credit limit set for 1 currency and when we entry in Collections form tab Profile show the correct amount.

But for customer with 2 credit limit ex: USD = 10 and PEN = 50, as the USD was the first currency set appear as default but show the Credit Limit = 49.

If we add a new Currency EX: BRL = 70 the USD credit Limit will show 48.

Did you know How can we fix this?

Thank you