When switching back and forth between the dual and single stream mode while playing the loading never finishes. <img width="993" alt="screen shot 2017-08-31 at 10 54 23" src="https://user-images.githubusercontent.com/2922744/29915028-ce9c9368-8e3a-11e7-8434-3010a18cbfeb.png"> Sometimes the initial loading doesn't finish at all and the duration time still shows 00:00. <img width="984" alt="screen shot 2017-08-31 at 10 56 49" src="https://user-images.githubusercontent.com/2922744/29915134-274cc866-8e3b-11e7-9df5-d6ea12b29354.png"> Both examples are taken from https://openwho.org/courses/pandemic-epidemic-diseases/items/30dQT84OkpHRM1b1SMtZtc.
When switching back and forth between the dual and single stream mode while playing the loading never finishes.
Sometimes the initial loading doesn't finish at all and the duration time still shows 00:00.
Both examples are taken from https://openwho.org/courses/pandemic-epidemic-diseases/items/30dQT84OkpHRM1b1SMtZtc.