I am using docker plugin to dynamically provision agents over a tcp+tls remote connection. This has been working fine but some recent change has given me the following regression:

java.lang.IllegalArgumentException: Invalid Proxy at java.base/java.net.Socket.<init>(Unknown Source) at org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory.createSocket(SSLConnectionSocketFactory.java:208) at org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:158) at org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:447) at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:162) at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:172) at org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:142) at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51) at org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:192) at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51) at org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:96) at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51) at org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:152) at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51) at org.apache.hc.client5.http.impl.classic.RedirectExec.execute(RedirectExec.java:115) at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51) at org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:170) at org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:87) at com.github.dockerjava.httpclient5.ApacheDockerHttpClientImpl.execute(ApacheDockerHttpClientImpl.java:191) at com.github.dockerjava.httpclient5.ApacheDockerHttpClient.execute(ApacheDockerHttpClient.java:9) at com.github.dockerjava.core.DefaultInvocationBuilder.execute(DefaultInvocationBuilder.java:228) at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:202) at com.github.dockerjava.core.DefaultInvocationBuilder.get(DefaultInvocationBuilder.java:74) at com.github.dockerjava.core.exec.ListContainersCmdExec.execute(ListContainersCmdExec.java:44) at com.github.dockerjava.core.exec.ListContainersCmdExec.execute(ListContainersCmdExec.java:15) at com.github.dockerjava.core.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21) at com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:33) at com.nirima.jenkins.plugins.docker.DockerCloud.countContainersInDocker(DockerCloud.java:638) at com.nirima.jenkins.plugins.docker.DockerCloud.canAddProvisionedAgent(DockerCloud.java:656) at com.nirima.jenkins.plugins.docker.DockerCloud.provision(DockerCloud.java:394) at hudson.slaves.Cloud.provision(Cloud.java:222) at hudson.slaves.NodeProvisioner$StandardStrategyImpl.apply(NodeProvisioner.java:726) at hudson.slaves.NodeProvisioner.update(NodeProvisioner.java:325) at hudson.slaves.NodeProvisioner$NodeProvisionerInvoker.doRun(NodeProvisioner.java:821) at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:92) at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:67) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source)