Does flying my Tello near a strong signal affect aircraft performance?

Dear,
Yes,  a strong signal affects aircraft's performancethe.

To avoid interference between your smart device and other wireless equipment, turn off other wiereless equipment while you are flying the aircraft.

Do not fly in areas where magnetic or radio interference may occur such as close to : Wi-Fi hotspots, routers, Bluetooth devices, high voltage lines, high voltage power transmission stations, mobile base stations, or broadcasting towers. Fyling in areas where interference may disrupt communication between the aircraft and the remote control device adversely affect flight orientation and location accuracy and may potentially lead to loss of control.

For more flight issues, please refer to User Manual, Disclaimer and Safety Guidelines, Quick-Strat Guide - Multi on RYZE official website.
https://www.ryzerobotics.com/tello/downloads

Hope my reply could help you.

Dear,
Yes,  a strong signal affects aircraft's performancethe.

To avoid interference between your smart device and other wireless equipment, turn off other wiereless equipment while you are flying the aircraft.

Do not fly in areas where magnetic or radio interference may occur such as close to : Wi-Fi hotspots, routers, Bluetooth devices, high voltage lines, high voltage power transmission stations, mobile base stations, or broadcasting towers. Fyling in areas where interference may disrupt communication between the aircraft and the remote control device adversely affect flight orientation and location accuracy and may potentially lead to loss of control.

For more flight issues, please refer to User Manual, Disclaimer and Safety Guidelines, Quick-Strat Guide - Multi on RYZE official website.
https://www.ryzerobotics.com/tello/downloads

Hope my reply could help you.