backup bonded interface set up on ubuntu-server that usually, but not always comes up on boot. Attached are some screenshots showing /etc/network/interfaces, journalctl and other relevant diagnostic info. on a boot in which the interfaces have not raised. Any suggestion as how to diagnose and fix this problem (the interface should come up reliably, every time) would be very appreciated. Note that bond-ce does come up reliably every time, it uses interfaces on a different pcie card, but other than that has identical config.

journalctl | grep bond

CONFIG and route

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