Hootoo HT-TM05 TripMate User Manual page 92

If you only changed the password, the TripMate will lose the
connection to your phone as well. And you have to click the TripMate
SSID to Forget Network then reconnect to TripMate, because generally
your phone can store the connected WiFi.
Example:
I only change the password for 6D22, TripMate loses the connection to
my phone
92