2508103 - G/L Account doesn't derive trading partner in FPE1.

When posting a document in FPE1 and the trading partner is filled in (not empty and it is derived by contract account) in business partner line. But the trading partner in G/L line doesn’t get derived at same time.

FI-CA - Contract Accounts Receivable and Payable

Manual Posting, VBUND, FPE1, RFKK_VBUND,  Trading partner, Cross-Company Posting , KBA , FI-CA , Contract Accounts Receivable and Payable , IS-U-CA , Contract Accounts Receivable and Payable , IS-T-CA , Contract Accounting , FS-CD , Collections and Disbursements , IS-PS-CA , Public Sector Contract Accounting , IS-M-CA , Contract Accounts Receivable and Payable , FI-CAX , Non-industry specific contract accounts receivable, payable , Problem