WS timeout has no effect if more than 60 seconds

see https://stackoverflow.com/q/45961070/1566975

response = WS.url(url).timeout("170s").postAsync() seems to fail: If your WS at url lasts more than 60 seconds and less than 170s, then response.onRedeem() call back is never called, response.isDone() is true and response.getOrNull() is null

I have attached a simple application that shows the problem (java8, play 1.4.4)

Execution logs:

10:07:06,542 INFO  ~ start JOB
10:07:06,552 INFO  ~ longTask called
10:08:06,776 INFO  ~ done onRedeem not called, isDone=true but response.get() is null
...
10:08:36,898 INFO  ~ done onRedeem not called, isDone=true but response.get() is null
10:08:36,898 ERROR ~ nothing under the sun after 90 seconds.

job-long-async.zip

Start with the attached job-long-async.zip application and the WS.url(url).timeout("170s").postAsync() entry point using Java 8 and Play 1.4.4. Reproduce a request lasting between 60 and 170 seconds, then trace why response.onRedeem() is not called despite isDone() being true. Done means the configured 170-second timeout governs the request and the callback receives the completed result.