Cannot Type Text After Left Clicking Mouse (Break / Attack)

Affects Windows 10 Edition PC

In 0.14.3 there is a bug where left clicking (breaking blocks / attack) will not allow Typing, including Signs, in chat, or in the Anvil gui.

The cursor shows, but no characters can be written. The rest of the keyboard works ('Esc' to exit sign gui, and then 'WASD' for movement etc)

Steps To Reproduce

• Left Click to attack/break
• Text cannot be entered now on signs, chat, anvil or main menu, unless TAB is pressed or the game is exited and restarted.

Temporary Workarounds
Press Tab to get typing back
Or, if your Win10 device has touch screen input, tap the screen

Does not affect players connected via LAN, just the Windows 10 Edition host.