The recent upgrade of ipset from 7.19-1 to 7.20-1 breaks ipset save by making it identical to ipset list.
Example output of ipset list
$ sudo ipset list SOME_IPSET
Name: SOME_IPSET
Type: bitmap:port
Revision: 3
Header: range 1-65535
Size in memory: 8264
References: 2
Number of entries: 1
Members:
57565
Example output of ipset save
$ sudo ipset save SOME_IPSET
create SOME_IPSET bitmap:port range 1-65535
add SOME_IPSET 57565
But with 7.20-1, ipset save now outputs identical to ipset list making ipset save useless. This caused me terrible problems before I figured out the change.
Downgrading to 7.19-1 set things right again.
Please fix this ASAP.