@IrU3 Use another ethernet cable (CAT5E or above) between ONT and AX3000. Sometimes the cable can cause such an issue. You may try the ethernet cable from one of the routers' kits - it should be...

@Lilimog Reset the RE to its factory defaults by pressing teh reset button for about 10 seconds. Move it to your old location and start setting it up. Use this guide for connecting to a Starlink -...

@Mizta_Banana Try another ethernet cable of Cat 5e or above. Sometimes a loose contact can cause this effect.

@Uk_pete_2000 You can try the following: Delete all the RE315 from NX200 WebGUI Easymesh network: Reset all the the RE315 by pressing the reset button for about 10 seconds. Start adding RE315 one by...

@Leh_Pics Latest FW version for v2 is TL-MR3420_V2_150319 - here. It seems that the USB port on this modem router supports only an LTE USB modem.

@jolly247 Disable Smart Connect feature in wireless settings and you should be able to change wireless channels.