Rbr50 and Rbs50 weird issues

Over the past week, my router has been losing connection on the LAN. I narrowed it down to my satellite. When it’s on, it will work great for a few hours, and suddenly I lose my LAN. Pinging the router fails intermittently, to the point it’s unusable. Turning off the satellite and rebooting the router fixes it. I’ve tried the latest firmware, older firmwares, nothing makes a difference. At this point I’m ready to buy something else. Any ideas on what could be the issue?