Workaround:
After final awake player leaves the game, Leave Bed, then return to sleep. Now morning will arrive quickly.
or
2. Wait until after the final (other) awake player leaves the game. Then go to bed. Now morning will arrive quickly.
But this bug is still annoying.
Bug confirmed still present in version 1.14 Pre-Release 5.
Bug confirmed still present in version 1.14 Pre-Release 4 (Java, Windows 10). Confirmed in game with both client and server at version 1.14 Pre-Release 4. Though the world was created in an earlier snapshot.
Steps to reproduce:
Only two players enter the world
Wait for night
Player 1 goes to bed
Player 2 leaves the game
Wait a while. Player 1 does not wake up.
Desired/Expected behavior: At step 5, player 1 should instead wake up within less than 10 seconds, and it should be morning then. As it is, with this bug I think you would need to wait 10 minutes for the natural progress of night to complete.
Bug confirmed still present in initial 1.14 release.