I figured a few things out from testing:
1. The wiimote actually works perfectly fine. I can hold down the button and it auto-repeats like in the last stable version (4.0.2). It's the nunchuk that's having the problem.
2. Changing the shake intensity in the game's .ini and/or binding buttons to ShakeHard/ShakeSoft didn't change anything.
3. I can sometimes emulate the effect by holding down the wiimote shake button and mashing the nunchuk shake button, so long as the wiimote's shake threshold is 0 and the nunchuk's is around 50. Raising it to 100 makes it fail and lowering it to 0 makes it fail. No idea why this is, but it kinda works.
1. The wiimote actually works perfectly fine. I can hold down the button and it auto-repeats like in the last stable version (4.0.2). It's the nunchuk that's having the problem.
2. Changing the shake intensity in the game's .ini and/or binding buttons to ShakeHard/ShakeSoft didn't change anything.
3. I can sometimes emulate the effect by holding down the wiimote shake button and mashing the nunchuk shake button, so long as the wiimote's shake threshold is 0 and the nunchuk's is around 50. Raising it to 100 makes it fail and lowering it to 0 makes it fail. No idea why this is, but it kinda works.