Big screen: map repeated but no activity on duplicate region

[okaki]

MacOS High Sierra 10.3.6
Chrome 68.0
Samsung UHD 40" TV

step:

1. Zoom out map
2. map is repeated
3. left region show activities, right repeated map not showing activities
   

[nerik]

@okaki Thanks for the report.

@enriquetuya This is an issue affecting both branches. Not trivial to fix.