I’ve noticed that multiple mappers have been infected by German style address mapping. That is using addr:suburb for the postal city and the municipality for addr:city. That doesn’t make any sense in Switzerland, it is outright wrong and messes things up.
Please use correct Swiss addresses for mapping and correct any that you’ve added wrongly, that is:
House number in addr:housenumber
Street or place localisation in addr:street / addr:place respectively
PLZ4 in addr:postcode
Postal city in addr:city
We have complete municipality and other borders which provide administrative localisation for purposes for which that is required.