@Someguy25384 I am not a TP-Link employee. You're with the latest FW and tether app releases. What you can do: Backup the AX55 configuration - details. Reset the AX55 to its factory defaults and make...

@Someguy25384 What's the version of your Tether app and the FW version of your AX55 ? Make sure that you have updated these to their latest versions.

@RANDOMUSER You should proabbly check this post - I believe it's related to what you've described.

@Gui_Lima They could but for optimal performance you should place them on the middle of the ceiling rather than in the corners - details. Here's a thread that could give you more perspective on site...

@Shelby87 Keep the second RE closer to your router when configuring and just after a successful configurtion position the RE where you need it - use this video guide for example.

@mlkpied In general connecting a second RE should be done the same way as the first one. Check this post for some important considerations.