The warnings are coming from Osmose (see the URL).  That checks for multiple issues against the opening_hours.  Feel free to get in touch if you have questions about it.

https://osmose.openstreetmap.fr/en/map/#zoom=8&lat=46.034&lon=-73.3&item=3250&level=1%2C2%2C3&tags=&fixable=online&useDevItem=all
