asus node slow

[niad]

Hi there so I recently bought ASUS WiFi 6 Router (RT-AX68U) works great so I decided to use aimesh with the old router that have the (RT-AC5300) I set it all up and it worked great had around 170 to 200 but as soon as I used my Xbox series x the speed went down to 30 to 50 which I thought was werid so decided to redo the aimesh because I thought I did something wrong i did it 10 times or so and it came out thr same good Speeds until I used my Xbox series x so I'm wondering if anyone here knows anything about this situation