After exporting custom POIs in a .kmz file the "doc.kml" containing some corrupted values. Because I don't know are they really important for an internal usage in Locus app and whether they will affect the further application behavior after being imported back, but in any case...
A piece of xml code with possible corrupted hrefs in bold:
<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
<name>POI_Locus17.04.2020</name>
<atom:author><atom:name>Locus (Android)</atom:name></atom:author>
<Style id="file:///sdcard/Locus/cache/images/1571471453728">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1571471453728.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>
</Style>
<Style id="file:///sdcard/Locus/cache/images/1571474934715">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1571474934715.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>
</Style>
<Style id="file:///sdcard/Locus/cache/images/1570260612568">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1570260612568.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>
A piece of xml code with possible corrupted hrefs in bold:
<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
<name>POI_Locus17.04.2020</name>
<atom:author><atom:name>Locus (Android)</atom:name></atom:author>
<Style id="file:///sdcard/Locus/cache/images/1571471453728">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1571471453728.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>
</Style>
<Style id="file:///sdcard/Locus/cache/images/1571474934715">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1571474934715.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>
</Style>
<Style id="file:///sdcard/Locus/cache/images/1570260612568">
<IconStyle>
<Icon><href>files/file-sdcardLocuscacheimages1570260612568.png</href></Icon>
<hotSpot x="0.5" y="0.0" xunits="fraction" yunits="fraction" />
</IconStyle>