Stop not resuming

When I press the stop button and try to resume by pressing the ok button twice and then the start button the mower keeps announcing that the mower is locked. The only way to get it to resume is to switch it off at the main switch for one minute then the announcements stop and I can resume operations.

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Hello, if you notice this issue keeps happening without improvement, it may be caused by poor contact of the button board. Please try again. If the problem persists, kindly contact our after-sales service as soon as possible.