6.2.15 Tooltip MOBILE: no or double results on tap

iOS7.0.2 iphone4s
http://mf-geoadmin30i.bgdi.admin.ch/main/prod/mobile.html?lang=de&X=177628.18&Y=656863.37&zoom=12&topic=ech&bgLayer=ch.swisstopo.pixelkarte-farbe&mobile=true&layers=ch.bfs.arealstatistik-1997,ch.swisstopo.fixpunkte-agnes 

tap on agnes point

result:

out of 10 tries
- nothing happens

then a result comes back:
- with two times the AGNES  station HABG in the object window


-> it seems like the "tap" timing is different (worse?) than in re2