Mapillary app too shaky on bike?

You should be able to turn off the check. I find it in Settings, in the Pausing section, under “Pause on shake”. That should fix that issue. However, I’ve found that the shaking of a mobile phone mounted on a bike will introduce some issues into the photos. Rolling shutter can cause bars of blurriness, or straight lines will become curved. Aside from buying a very stable mount, I don’t think there’s a great fix to these issues. The best way to combat them is to shoot in very good light, and ride smoothly.