When sparking a button surrounded by a switch, and the switch is activated while the button is being sparked, the switch doesn't activate completely and sometimes the sparks get stuck in the button after they stop:

Is this a bug? 

Another way to use that example is press the "delay on" button (3 seconds before the switches turn on) and continuously spark one of the buttons until the switches activate.

The bottom right part of that save has a more practical example where this is a problem; it's a toggle button with a power light and a circuit that takes some time to turn on. If you spark the button for too long, the button (or sometimes the switch) gets stuck. In that example I could use LCRY instead but SWCH is all for aesthetics - the glow looks nice in fancy mode and it's difficult to make LCRY checkerboard patterns for the red <-> green.

Somebody suggested to me that it might happen more often with 2 pixels of switch border instead of one; the example above shows that it happens in both cases.

That's all with build 132.

In 133 (spark speed test) it also happens, it's just more consistent.

-C