I tried british-isle and it started out fine, then my screen went off and when I turned my screen back on after a while the download had stopped at around 20MB's.
I closed the download dialog and the map was present in the maps list on the phone which was a bit confusing since the download didn't complete
I deleted the map and started the download again but this time kept the screen on and it completed fine
suggestions:
- if possible add a pause/resume option
that way if a download stopped a user can press pause and then resume and it will continue
- rename the extension until the download is complete
if a download isn't completed it will not be shown in Locus
small remark on Field Notes, I really like the newly implemented features but the Settings - Geocaching - Field Notes - Pre-fill format is still a message field which doesn't accept newlines
I hope you can change this to also support newlines and hope it's not too much work

thanks in advance!