Problem module geofield & module date range

Bonjour !

I have two display problems with the editing interface of the two modules "Geofield" and "Date Range" with the nice and pleasant to configure Drupal8 W3CSS theme.

1. Date range module
Depending on the size of the screens (responsive), the display of the edit fields of the authors of date ranges react differently.

Here are two screenshots that show the problem.

2. Geofield Module

Under the geolocation search field, the term "Enter an address to retrieve location" always has the focus in the foreground. As a result, the search results cannot be validated.

As shown in these two screenshots.

Thank you for your work.
Sincerely
Gisles