I’m running the latest versions of everything combined with SonarCloud:
SonarQube Scanner 188.8.131.523
SonarCFamily plugin version: 184.108.40.20600
SonarQube server 8.0.0
Whenever I run a full build (e.g. on CI, but this is also replicable locally), the SonarCFamily cache is fully invalidated with 0 hits, even when just a single non-header file has changed. If I run an incremental build, then the cache works as expected.