Not sure what happens behind the scene, but here is an example of two consecutive requests.
map.png respond with an http code of 200, whereas maps.info responds with 204 (no content).
Something is misbehaving there, only GS can do a real debug...
08-21 22:37:51.440 30598-5111/cgeo.geocaching D/cgeo: [OkHttp] GET https://tiles.geocaching.com/map.png?x=2125&y=1494&z=12&ep=1&app=cgeo&k=3kkw&st=YSWS34kUh5pxhp1-idIwHK1WbejINF--6OW87Yl6_6rJwDnvN2WH3DKeJ4lVPiPg4zH0skP9qZmigVgxZWL9orl_e3BKPAr45r8gaGyMwBh2MldpkQ5OCxTBsegDIiNa0&_=1471811871437
08-21 22:37:53.353 30598-5111/cgeo.geocaching D/cgeo: [OkHttp] 200 (1913 ms) GET https://tiles.geocaching.com/map.png?x=2125&y=1494&z=12&ep=1&app=cgeo&k=3kkw&st=YSWS34kUh5pxhp1-idIwHK1WbejINF--6OW87Yl6_6rJwDnvN2WH3DKeJ4lVPiPg4zH0skP9qZmigVgxZWL9orl_e3BKPAr45r8gaGyMwBh2MldpkQ5OCxTBsegDIiNa0&_=1471811871437 (http/1.1)
08-21 22:37:53.356 30598-5111/cgeo.geocaching D/cgeo: [OkHttp] GET https://tiles.geocaching.com/map.info?x=2125&y=1494&z=12&ep=1&app=cgeo&k=3kkw&st=YSWS34kUh5pxhp1-idIwHK1WbejINF--6OW87Yl6_6rJwDnvN2WH3DKeJ4lVPiPg4zH0skP9qZmigVgxZWL9orl_e3BKPAr45r8gaGyMwBh2MldpkQ5OCxTBsegDIiNa0&_=1471811871437
08-21 22:37:55.845 30598-5111/cgeo.geocaching D/cgeo: [OkHttp] 204 (2489 ms) GET https://tiles.geocaching.com/map.info?x=2125&y=1494&z=12&ep=1&app=cgeo&k=3kkw&st=YSWS34kUh5pxhp1-idIwHK1WbejINF--6OW87Yl6_6rJwDnvN2WH3DKeJ4lVPiPg4zH0skP9qZmigVgxZWL9orl_e3BKPAr45r8gaGyMwBh2MldpkQ5OCxTBsegDIiNa0&_=1471811871437 (http/1.1)