Contact them immediately! I had this issue on two of them and fixed it -- but they're also replacing them.
1. Turn off your OG Pebble
2. Remove the rear panel, either with the proper screwdriver or a small precision flathead
3. Gently lift up the panel and move it to the side. The vibration is glued to this panel, so go slowly. You do not have to remove the vibration piece.
4. Cut two small pieces of paper to fit the side of the pebble with the board exposed. Cut a space for the wiring, then slip it in.
1. Turn off your OG Pebble
2. Remove the rear panel, either with the proper screwdriver or a small precision flathead
3. Gently lift up the panel and move it to the side. The vibration is glued to this panel, so go slowly. You do not have to remove the vibration piece.
4. Cut two small pieces of paper to fit the side of the pebble with the board exposed. Cut a space for the wiring, then slip it in.
5. Reassemble the Pebble
6. Turn it on.