Series S constant disconnect from Live.

My Xbox series S just constantly gets disconnected from Xbox live almost every 40 minutes for about 5 seconds then reconnects. This is infuriating. I use a wired connection and every other device is fine even the old Xbox one s doesn't have this stuff happen. I've replaced the ethernet cable three times today and still get disconnect. I've reset my modem multiple times and still nothing. Was fine a week ago but not now. I've tried everything. Hard reset the Xbox (unplugged everything held power button for 10 seconds). I'm not sure if there's something faulty on this series S. But in my experience so far the one s is waaaaay better never ever had any issues with the one s, the series S is a nightmare. Literally bought this brand new last year from Walmart. Never dropped it, never damaged it. But just constant issues. Where as my one s is so beat to a pulp it's falling apart yet still works perfectly. Need assistance with this. Ty.

:)