My son has just received Minecraft: Dungeons HE today for his birthday. It installed, then automatically updated 1.09. Both he and his sister have been playing offline local coop all morning. They turned it off to play standard Minecraft. Now, logging into Dungeons for the 2nd time, no 2 player local coop available. It seems the L3 button does not register on main screen or in-game camp. This doesn't work on his sisters account (both non PSN). I have logged in on my PSN account for first time and doesn't work for me.

Update: Performed a delete and re-installation of Dungeons, which fixed the issue. Shutdown game, reopened game, still working. So far...

 Update: Stopped working. Total reinstall had no effect.