Please apply upstream commit 8f56bc4dc101 ("ionic: start queues before announcing link up") to 5.10.
When initially discussed, the implied race condition was still theoretical. Since then, a case has been found to generate the race issue and cause a failure to bring up the netdev interface by having the device in a bond and the bond driver trying to bring up the device on the netif_carrier_on() notification but before the queues have been started.
This should be applied to 5.10 stable.
Thanks, sln