I have the exactly same problem and like you, until a queue is required to login I get DCed after 1 sec of seeing my character. I don't have this game installed on a SSD so I don't really understand.
SPECS: I7 3930k @4 Ghz, R9 390, 8gb DDR3, 4K windowed
Things I've tried and did not work:
-deleting WTF, WDB
-game client restarts
-waiting 10 min or more at the character selection screen
-PC restarts
-changed config from WTF to one from another post
-restarted my internet connection
-ipconfig renew and flushdns
-no addons
-increase MB for addons
-new character on the same server
Only thing that seems to fix it is when I wait like 1 hour and I have to stay in queue to join but I dislike having the idea of playing and then having to stay 1h in queue to play again.
Friends say that after i DC I remain online for serveral minutes. Maybe this has something to do with the feature they added a couple of days ago:
"We are temporarily capping the PvP server at 9.5k. Additionally, there is now a 3 minute grace period to bypass the queue if you disconnect."