Don't raise that issue, Monster. That rule became effective July 1, 2018, after the check was mobile deposited. And it only addresses an indemnity between two depositary banks, with no involvement by the paying bank.
In this case, I agree with TWMJ. The paying bank should try to collect from the second depositary bank.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8