I have got a Windows Phone [Lumia 620] with WhatsApp [version 2.11.688]. Whenever I click on a conversation [or I am in the middle of a conversation] and want to check it over by scrolling it up to check some messages that I want to examine again, WhatsApp after some time [about 20 seconds or thereabouts] WhatsApp all of a sudden makes me go away from the conversation and it redirects me to the main screen [the Start menu with all the apps]. I tried to archive and/or save the chat and send it by e-mail so that I would manage to check over the conversation quietly, but it is not what I wanted to do, because actually I would like to find again something I recorded through the rec button near the textbox [the space wherein to type] and in the e-mail of course I cannot hear it.
So, how to prevent WhatsApp from forcing me to leave the conversation? Only when I do such a thing, the conversation disappears.