SGP612 / german / no Android 5.1.1

There is no Android 5.1.1 for the german SHP612. Actually the german Firmware is now 4 updates behind.

XperiaFirm tells me that 5.0.2 is the newest available.
Screenshot: https://drive.google.com/file/d/0B_p...ew?usp=sharing

Can you guys think uf a reason for this?