The connection check is not working as expected sometimes when publishing build scan

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2

when checking the gradle environment piece by piece, I found the following empty properites in ~/.gradle/gradle.properties:

systemProp.http.proxyHost=
systemProp.http.proxyPort=
systemProp.http.nonProxyHosts=
systemProp.https.proxyHost=
systemProp.https.proxyPort=
systemProp.https.nonProxyHosts=

After remove these properties, the build scan could work well now.