Describe the feel and response
Say whether the button is stuck, soft or apparently normal and whether activation is intermittent. Include any recent under-sink clearing or cabinet work.
Keep the systems separate
The button, connecting arrangement and powered switch may require assessment. Do not bypass the control or open electrical enclosures to keep using the disposer.
A useful distinction
A button mounted in a worktop can be disturbed during unrelated sink work. Describe that history without reconnecting tubes or bypassing the powered accessory; the correct arrangement depends on the installed control system.