Maps not dropping above T6

No maps above Tier 6 are dropping for me.
I´ve completed the Tier 9+ Corrupted Nexus with help of the refoging bench, but Tier 12+ is kinda unrealistic.
The other quests i have left are 50 runic Splinters, which seldomly drop.
And the Crisis Fragments, which are FAAAR away ...

If this is intended, this is shitty endgame.

The Citadel NEED level 15 Maps

+1. Last patch messed ut the droprate.

okay, i have tried leveling other characters ... ALL STUCK at tier 6 maps.
if someone finds a solution, please post it here, i will not play the game with only lvl6 maps ... this is torture!

i even ran tier 12 Maps and got tier 6 maps as a drop there.