When sending XEC, BCH were sent simultaneously

Good afternoon
I made a deposit in XEC on the MEXC. When transferring coins, my BCH coins were automatically transferred. What to do in this situation.

The report only describes an XEC deposit and an unexpected BCH transfer; it names no files, tests, or entry points. Reproduce the transfer behavior and determine which component handles the transaction before defining a fix and a test for preventing unintended BCH transfers.

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