Tasks page stuck had to refresh to continue so i lost out on bonus points

Hi Team,
Please see below screenshots. Whilst i was in the tasks lab working on Installation and configuration of Iptables it stuck and the page became blank.

The validation of the solution took a very long to complete(about 6mins).
Please see below.

Sorry for this issue, sometimes such issues occur due to network latency or some back end issues. Is it working fine now?

Oh yes it worked. However, i had to do another session.
Thank you