Yes it (IGMP) works! Thank you.

@Kentthegreet1 Thanks! Enabling IGMP Snooping in the Advanced tab under Network/LAN Settings seems to have solved the issue also for me.

@Michaelehowe Thank you! Enabling IGMP Snooping worked for me! Now internet connection is stable! Thank again.

I have the same problem. MR 600 disconnect randomly from internet, it needs a reboot to work again. I use it with ethernet not WiFi. My firmware is 1.1.0 0.9.1 v0001.0 Build 190412 Rel.66770n