ipset v7.22: The set with the given name does not exist
otbr-agent[84842]: 00:00:00.033 [I] Platform------: Execute command `ipset flush otbr-ingress-allow-dst-swap` = 256
otbr-agent[84842]: 00:00:00.033 [I] Platform------: Got an error when executing command `ipset flush otbr-ingress-allow-dst-swap`: `Resource temporarily unavailable`

hmm. i have no clue about ipset, nor this message