Why is the right bumper working as the power button?

Why is the right bumper working as the power Button?

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Think you can give us some more details? What exactly happens when you press it?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

My switchlite replace a direction key by myself.

After that the L button working as a power button.

Everytime I click L button will lock screen.

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