Sonar.issue.ignore.multicriteria doesn't work on common-c:InsufficientCommentDensity

Hello
I am using sonar scanner 3.2.0.1227 on Ubuntu 18.04. I use sonar.issue.ignore.multicriteria for ignoring several rules from rats and cppcheck, no problem. But I can’t get that to work on “common-c” rules. Tried for both InsufficientLineCoverage and InsufficientCommentDensity, doesn’t seem to do anything. Tried with prefix “common-c:” or “c:” or nothing.
Thanks
Brice