UMAP: Location search doesn’t work using Android devices

Using https://umap.openstreetmap.fr/en/ the magnifying glass 'Jump to Location' icon on the left doesn't seem to work with Android devices. You can type in a location but the enter key doesn't work. Nor does clicking on the icon again. I've tried this with a lot of the main Android browsers.

This severly limits the usefulness of custom umap layers.

Has anyone found a work around?