When I overcharge Titan-touched NOdes on my Paladin, the portal that spawns teleports me to the node I am at, this has happened now 4 times in a row, giving me no benefit whatsover.
This is happening on my level 70 Zandalari Troll Paladin on Turalyon.
Happens to many people.
The current consensus is that the portal has a range and if no other node are within the range, it teleports you back in the same place.