@TECHO 

Hi,

I suggest trying the beta firmware. You can find more infomation about the beta here. Please keep the following in mind. 

• This firmware can’t be degraded directly to the previous version. A firmware recovery is required to revert to the official 1.3.1 version.
• How to manually update the firmware via web UI.

Best Regards

  @TECHO 

Double checking right now please hold 

  @TECHO 

If your device label shows "Ver: 1.0" (which indicates hardware version 1.0), you should only install firmware specifically designated for V1.0. Firmware labeled for V1.30 or V1.33 would be for different hardware versions and should not be installed on a V1.0 device.

So at this time do not try that beta. See if any of the following suggestion help.

Since intermittent disconnections can have different causes depending on whether it's the main Deco, satellite units, or client devices experiencing issues, let me provide you with comprehensive troubleshooting steps:

For Main Deco unstable/dropping issues:
1. Make sure the Ethernet cable is connected properly, replace old cables with new ones.
2. In the Deco APP > MORE > Internet Connection > IPv4 > DNS Address, change the two DNS servers to 8.8.8.8 and 1.1.1.1.
3. Clone the MAC address of your PC or your old Router. You can refer to this FAQ for MAC clone: https://www.tp-link.com/en/support/faq/2925/

For Satellite Deco unstable/dropping issues:
1. Make sure both the main Deco and satellite units are properly placed. Do not put any Deco unit in enclosed spaces like cabinets, shelves, or corners • they should be in open areas.
2. Move the satellite units closer to the main Deco. Ideal backhaul signal strength should be 2/3 bars.
3. Remove the Ethernet cables attached to the satellite units to see if this temporarily resolves the issue.
4. Open the Deco app, go to MORE > ECO Mode (if available), and ensure that ECO Mode is turned off.

For Client devices unstable/dropping issues (such as laptops, PCs, phones, IoT smart devices) while all Deco units show green lights:

1. If your mobile devices (laptops, PCs, phones, tablets) experience dropping issues:
   • In the client list section of the Deco app, select your client device and verify that 'Speed Limit' is disabled and that 'Mesh' and 'Connection Preference' settings are not mistakenly configured. The 'Mesh' option should be 'on' and 'Connection Preference' should be 'auto' by default.
   • In the 'Parental Control' section of the Deco app, ensure that your devices are not accidentally restricted by parental control profiles.
   • Ensure your mobile devices are connected to the nearest Deco unit with strong signal and are using the 5GHz band instead of 2.4GHz, as 2.4GHz is not recommended for high-speed devices. Turn Wi-Fi off on the device and turn it back on to reconnect to the network.

2. If you have 2.4GHz IoT smart devices experiencing dropping issues:
   • Use the 'Network Optimization' tool in the Deco app to automatically optimize your 2.4GHz Wi-Fi channels.
   • If you have multiple Deco units and many IoT devices, temporarily power off some of them to verify if this improves the situation.

If the issue persists after trying these steps, please reply back to this post. 

  @TECHO 

Yes no beta at this time and you may be able to downgrade some firmware cant be rolled back see if this post helps 

https://community.tp-link.com/en/home/forum/topic/702312

  @TECHO 

Hi,
Here is a new firmware for the Deco X55 V1.0; you can test if it helps.
Best Regards

  @TECHO 

Sorry for the confusion on the beta there was in fact a new beta for you to try @Solla-topee already posted the link for you in the above post