The LAGOON ANC headphones boast a smart built-in feature, which pauses media playback when they are removed and thus saves energy. So, when you remove the headphones, media playback is paused, and when you put the headphones back on, media playback starts again. If the LAGOON ANC headphones are switched off unintentionally, for example if you lean forwards quite far whilst wearing them, you can start playback again manually as usual by double tapping the touch-sensitive interface.
From firmware version 1.0.18 on, you can switch this automatic function on or off in the MIY app (from version 2.2).