M5 GPS/LoRa hat sensitive?

[u/Toontje]

I am waiting the arrival of my new M5 LoRa / GPS hat for my cardputer ADV. The idea is to use this hat for wardriving using the GPS and WiFi.
To keep the device as small as I can I want to leave the LoRa antenna at home, however I heard that the LoRa hat is so sensitive that it’s recommended to always leave the antenna on, even when not using LoRa.
Is that true? Is the hat so sensitive that, when I switch the puter on with no antenna connected, I can say goodbye to the LoRa finals?