Extending drone jump distance by key
I am struggling to consistently pick up the portals I want to jump to with keys.
Sometimes it randomly shows portals whose keys are tucked away in a key locker, even though I have not opened that locker since I previously went to drone view and they were invisible.
Sometimes I can see portals 1.5km away, sometimes I can't even make a portal that is <1.25km away show - despite going to remote view via its key several times.
Sometimes the distant portals remain visible after I have gone into remote view via the drone, sometimes they vanish.
The thinking seems to be that if a portal is up to 1.25km away from the drone's current location and you hold a key to it, you can jump to it. I have certainly (when I can see the portals) not found an exception to this, but my key jump experience is limited.
Do those of you who have also experimented with "key jumps" experience similar frustrations when trying to see the desired portal? Anyone got any tips on how I can consistently find the portal I want?