https://www.tp-link.com/en/support/download/deco-m5/v2/#Firmware

Yes there is but be adviced: you may end up with a brick, i am not responsible if anything goes wrong . https://www.tp-link.com/us/support/faq/2958/

@David-TP About the MTU on PPPoE, there is defenatly a change in MTU settings on this beta firmare. I had this problem with all 1.6.0 firmware, reverting back to 1.5.xx corrected the MTU. I realized...

@BenjaminNYC Maybe yes , maybe not. It depends of your configuration. My scheduled reboot never worked, i had to power off/on because after the scheduled reboot some devices had problem connecting to...

@TP-Link Once again I had to revert back to previous working stable firmware . There was a really annoying problem with wrong MTU settings in PPPoE Wan connections. Tried every possible setting but...

@David-TP The problem is when it happens the tab Smart is not available so I can not add smart devices. If I reboot the smart tab appears again with all connected smart devices. I will try and record...