As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VERTICAL SPEED SELECTOR JUMPS BETWEEN VALUES INSTEAD OF HAVING LINEAR SCALING WHEN SELECTED. GROUNDED - YES. ACCOMPLISHED DFCS OPERATION TEST REF B737-800 AMM 22-11-00-740-801 MCP VERTICAL SPEED KNOB CK 12.56 TEST PASS. WIITH VERTICAL SPEED SELECTOR CYCLED THROUGH, NO JUMPING NOTED.