Best answer by Max
Glad to hear that you are using the M5 tablet.
In response to your inquiry, the Wi-Fi and Bluetooth hardware are deisgned to be in the same chipset and are using the same frequency band. Therefore, using Bluetooth while surfing the Internet using Wi-Fi may cause the Wi-Fi speed to slow down.
Since the M5 supports dual band (2.4 GHz and 5 GHz), use the 5 GHz band to connect to Wi-Fi.
Hope this proves useful!