It wouldn't be a Tuya product if this device followed the Zigbee standards!
Technically, Tuya has reversed the 'direction' flag in the Zigbee message and the HE hub (following strictly the standards) does not acknowledge the reception. That's why the device repeats the button press message 3 times (except for the first button).
You can use the custom driver, where the debouncing is built into the driver.