Eviction get stuck with <off-heap> configuration and optimistic transactions

If the cache is configured as followed adding entries every second will end up in an unresponsive server.
The client will stop after 120sec (eviction count reached) with

Exception in thread "main" org.infinispan.client.hotrod.exceptions.TransportException:: java.net.SocketTimeoutException: PutOperation

{ExpirationCache, key=[B0x033E17323031392D..[26], value=[B0x033F280058585858..[10244], flags=4} timed out after 60000 ms
at org.infinispan.client.hotrod.impl.Util.rewrap(Util.java:54)
at org.infinispan.client.hotrod.impl.Util.await(Util.java:27)
at org.infinispan.client.hotrod.impl.RemoteCacheImpl.put(RemoteCacheImpl.java:335)
at org.infinispan.client.hotrod.impl.RemoteCacheSupport.put(RemoteCacheSupport.java:129)
at org.infinispan.wfink.hotrod.client.HotRodConstantLoadExpirationClient.putWithExpiration(HotRodConstantLoadExpirationClient.java:48)
at org.infinispan.wfink.hotrod.client.HotRodConstantLoadExpirationClient.testLoop(HotRodConstantLoadExpirationClient.java:84)
at org.infinispan.wfink.hotrod.client.HotRodConstantLoadExpirationClient.main(HotRodConstantLoadExpirationClient.java:160)
Caused by: java.net.SocketTimeoutException: PutOperation{ExpirationCache, key=[B0x033E17323031392D..[26], value=[B0x033F280058585858..[10244], flags=4}

timed out after 60000 ms
at org.infinispan.client.hotrod.impl.operations.HotRodOperation.run(HotRodOperation.java:172)
at io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38)
at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:127)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:322)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)