Confirm 0.14.3 does fix this (for me).
I indeed am and as far as I am aware, this is the latest insider build (Build 14332.rs1_release.160422-1940).
I didn't actually head to this "MCPE-14381" myself - I was given a URL from Mojang's Twitter support.
Is there any way to check what version I have installed (other than being 0.14.2)? I have reinstalled MC: Win10E inside this preview build so I should have the latest version available to this version of Windows.
If I am indeed in the wrong location, is it possible for a mod to correctly tag/move this thread?
I have just realised how old your comment asking about that is.
I LITERALLY only just got an email notifying me.
Apologies for the extremely delayed confirmation.
This appears to be fixed.
I am able to play, including in full screen.
Sorry to say this guys, but my copy just started working out of nowhere.
Are you playing in full screen? If so, when you start MCW10E, keep pushing your mouse to the top of your screen to see the title bar, then take it out of fullscreen before the game menu loads.
I /have/ to do this, otherwise the game needs to be force closed via task manager.
This bug is still active and seems to affect my realm immediately after leaving rather than with any kind of delay. I myself am affected by the CommandBlockOutput gamerule, so Umija5895's response to "Im Brett K" regarding that is especially insulting. Perhaps they should learn to read a comment properly before making assumptions.
My temporary workaround until this gets fixed is to (rather ironically) place a repeating command block inside a ticking area with the gamerule command inside it, so that it automatically sets it to what you want whenever the world is reloaded. One command block per gamerule.