Multi-currency transactions with trading accounts from 2.4.13 getting messed up in latest 2.6.3

[Mark]

So here is an exact example of what I am talking about:

In 2.4.15, my transaction looks like this:
Account                  Decrease        Increase Currency
=============================================================
Asset account-USD        4,522.34                       USD
Trading:CURRENCY:EUR     3,379.15                       EUR
Asset account-EUR                        3,379.15       EUR
Trading:CURRENCY:USD                     4,522.34       USD


Opening the file in 2.6.3, the amount of the EUR trading account is 
suddenly changed to the amount of the USD trading account, which throws 
the transaction out of balance.
In order to compensate, an Imbalance split line is being added:

Account                  Decrease        Increase Currency
=============================================================
Asset account-USD        4,522.34                       USD
Trading:CURRENCY:EUR     4,522.34                       EUR
Asset account-EUR                        3,379.15       EUR
Trading:CURRENCY:USD                     4,522.34       USD
Imbalance-EUR                            1,143.19       EUR


This is happening right after I open the file, before I even select or 
open any accounts or transactions.
And as I said, trying to manually adjust the transaction to look like it 
did originally is not possible. When I try to save it, it kicks it back 
to the second version with the Imbalance line.

Thank you,

Mark