Upgrade from linux-lts-5.10.25 to linux-lts 5.10.26 breaks bonding.

Arch linux-lts-5.10.25-1 to linux-lts 5.10.26-1

This is on a wireless bonding setup with fallback to wired ethernet.  Everything with the interfaces looks fine, except, for instance, ping returns the error message "ping: sendmsg: Invalid argument".  Of course, networking becomes unusable.

Removing the bonding interface, and adding an IP address directly to either wired or wireless interface, networking works normally.

This is not to do with the linux-firmware package, where downgrading linux-firmware makes no difference.

Downgrading the kernel resolves the problem, but I don't see any bonding commits between linux-lts-5.10.25 and linux-lts 5.10.26.

Any thoughts, shy of performing a full bisect, would be appreciated.

James