Expires On not being honored

I have a dynamic Web Resource and have set each URL Container to refresh every 10 minutes. Serviio ignores that value and refreshes every 5 minutes.
To illustrate the problem I have generated log entries showning create date and requested expiry date for each container.
As you can see in the attached log, after parsing the feeds Serviio shows expiry in 24 hours as per my console entry rather than the earliest feed expiry.
I can live with that but the bug is that the container then expires in 5 minutes rather than the 10 minutes I set, as you can see from the expiry time stamps.
How do I fix that.
To illustrate the problem I have generated log entries showning create date and requested expiry date for each container.
As you can see in the attached log, after parsing the feeds Serviio shows expiry in 24 hours as per my console entry rather than the earliest feed expiry.
I can live with that but the bug is that the container then expires in 5 minutes rather than the 10 minutes I set, as you can see from the expiry time stamps.
How do I fix that.