Weather app locations disappearing and adding unwanted locations

On iPhone 6, Software version 12.5.5, I keep losing locations I input on the Apple Weather app.. In 2019 I added about 8 locations and they were always there, rain or shine! After over two years, the locations disappeared and three others keep appearing: Ottawa, Montreal and Toronto. I don't want any of these. I have tried various suggestions such as removing the app, restarting the phone, re-adding the app, etc. but nothing seems to work. Any further suggestions?