Sometimes people report that plugging in their drawing tablet interferes with their WiFi connections or internet.
It isn't a super-common problem, but it does happen. People report it for all tablet brands.
One cause of WiFi problems is electromagenetic interference
The cause of this is not clear but here are some discussion threads that might help
https://superuser.com/questions/820693/wi-fi-turns-off-when-usb-device-is-plugged-in https://www.reddit.com/r/wacom/comments/13h4fuj/my_tablet_might_be_ruining_my_wifi/ https://www.reddit.com/r/wacom/comments/l02xhj/wacom_one_killing_wifi_connection/ https://www.reddit.com/r/wacom/comments/jpusqc/wifi_interference_problems/ https://www.reddit.com/r/wacom/comments/8iny9u/cintiq_22hdt_interferes_with_wifi_when_plugged_in/ https://www.reddit.com/r/wacom/comments/7g6f6w/problem_with_cintiq_pro_16_slowing_down_internet/ https://www.reddit.com/r/huion/comments/wtmulg/kamvas_13_no_wifi_when_its_plugged_into_my/ https://www.reddit.com/r/huion/comments/fm12b3/kamvas_16_pro_macbook_pro_15_no_24ghz_wifi/ https://www.reddit.com/r/huion/comments/u5rg79/kamvas_pro_13_cutting_off_internet/ https://www.reddit.com/r/huion/comments/icegs1/kamvas_pro_12_internetwifi_problems/