Moderator note
Not a Minecraft bug, this is a hardware issue.
Keyboards cannot necessarily record 3 random pressed keys at once, especially Laptop / Notebook / Wireless Keyboards have different keyboard matrix / CPUs compared to desktop keyboards.
There is nothing you can do to solve this except for switching to another keyboard that doesn't have this issue.
Cannot move left while holding the TAB and LSHIFT keys at the same time.
This occurs in all recent versions of the game (1.7.X, Snapshots)
Java 7 on Windows 8.1.
Linked issues
is duplicated by 62
MC-276166
Pressing the forward and backward buttons simultaneously while squatting causes incorrect behavior in the game
Resolved
MC-267756
cant switch to hotbar slot
Resolved
MC-265192
Multiple Key Presses Not Working
Resolved
MC-263730
Unable to jump while sprinting with control key
Resolved
MC-263860
Cannot switch to new item in hotbar while crouching
Resolved
relates to 1
Comments 8
Confirmed for me in 14w18a, but shift+any arrow doesn't work for me AT ALL, due no doubt to the fact that I use the keypad arrows to move. I never noticed before because I use the keypad for crouch, and every other button too (isn't that the point of gaming with the keypad arrows? enough buttons beside the arrows to handle everything?)
So doing a PROPER playtest (setting the movement and crouch to defaults): cannot reproduce. But for anyone using the keypad for movement there's a bug there.
Ah ok, retesting...
Confirmed in 14w18a (yes with default controls). Why only left is affected but not the other 3 directions is beyond me.
Not a Minecraft bug, this is a hardware issue.
Keyboards cannot necessarily record 3 random pressed keys at once, especially Laptop / Notebook / Wireless Keyboards have different keyboard matrix / CPUs compared to desktop keyboards.
I have a "normal" 104 key keyboard and any combination of three keys out of TAB/LSHIFT/CTRL plus movement keys is working here fine on Windows 7.
Cannot reproduce.