screen locks

very commonly my screen locks upon completion of an upgrade forcing me to exit and start over

December 18, 2014


"upgrade"?? What "upgrade" are you talking about? Does this happen on duolingo only or on other websites too?

December 18, 2014

By "upgrade" I mean "lesson practice" - it happens only (and often) on duolingo.

December 19, 2014
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