there is a few combination you may do with items you want to import
a) import into locus database
b) import into locus database and display on map
c) do not import into locus data, so only display on map
where
a) "only display" - disabled, "show on map" - disabled
b) "only display" - disabled, "show on map" - enabled
c) "only display" - enabled, "show on map" - cannot be changed
As we talk about it, this should be changed for some selection like at start of my post
- import
- import and display
- only display
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And fact that some items are visible after restart and some don't ... generaly if you import any data into Locus, Locus should correctly import only points & tracks - all other, like KMZ maps, are visible on map, but not imported into database. So if you want to have KMZ map visible everytime you start locus, currently best is to place this map into Locus/mapItems and enable this map in data > items screen. Hope this helps you, otherwise feel free to ask