When pushing a button, the sides of it look like the button was squashed instead of being pushed into the wall.

_{Mod note: Fix from MC-90456 by Coolio_Wolfus}

Button not pressed the textures are:

                "north": { "uv": [ 5, 14, 11, 16 ], "texture": "#texture" },
                "south": { "uv": [ 5, 14, 11, 16 ], "texture": "#texture" },
                "west":  { "uv": [ 6, 14, 10, 16 ], "texture": "#texture" },
                "east":  { "uv": [ 6, 14, 10, 16 ], "texture": "#texture" }

However when pressed they change to:

                "north": { "uv": [ 5, 15, 11, 16 ], "texture": "#texture" },
                "south": { "uv": [ 5, 15, 11, 16 ], "texture": "#texture" },
                "west":  { "uv": [ 6, 15, 10, 16 ], "texture": "#texture" },
                "east":  { "uv": [ 6, 15, 10, 16 ], "texture": "#texture" }

This causes the impression the button is pressed but the texture has jumped, the front sides of the button changes to the back sides texture when it's pressed.

Example: Wall, back px 1, front px 2, Air
W12A < button not pushed
W1A < button pushed default 1.8+ mc (looks weird)
W2A < what it now looks like with this fix (outer texture moves in towards wall for duration of press event)

The fix is to change the texture on the pressed button to:

                "north": { "uv": [ 5, 14, 11, 15 ], "texture": "#texture" },
                "south": { "uv": [ 5, 14, 11, 15 ], "texture": "#texture" },
                "west":  { "uv": [ 6, 14, 10, 15 ], "texture": "#texture" },
                "east":  { "uv": [ 6, 14, 10, 15 ], "texture": "#texture" }

And the front edge texture moves towards the wall when the button is pressed and out as the button returns to normal.

Hope this is a simple bug to fix... (See attached button_pressed.json for the fix.)

In time order,
<- Unpressed Buttons
<- Current buttons pressed note the side texture.
<- Corrected version front texture moves closer.

The original has the near block texture jumping forward to remain visible, whereas with this suggested fix, it looks like the button actually moves as the near block texture seems to go into the block.

Just added a Resource Pack version of my fix, called Button Hotfix.zip
Hope this helps make testing the fix easier.