Two AES keys for the same meter (Techem Radio 4)

[Tom1000]

I am renting multiple water meters with Radio 4 module from TECHEM in Germany, and I received AES keys from them to decode the telegrams. Similar to some earlier reporting I also received two AES keys per meter.

The meter send two messages a few seconds apart, both encrypted with the different keys. However, how can I create the correct meter files to distinguish the telegrams from each other? I saw this post with the hint to distinguish by type/version, but they seem to be the same in my case:

left: first shorter message right: longer message received a few seconds later

So both messages differ in length and RSSI, but all other parameters seem to be the same:
(telegram) DLL L=36 C=44 (from meter SND_NR) M=5068 (TCH) A=23306862 VER=95 TYPE=37 (Radio converter (meter side)) (driver mkradio4a) DEV=amb8465[00000000] RSSI=-91
and:
(telegram) DLL L=56 C=44 (from meter SND_NR) M=5068 (TCH) A=23306862 VER=95 TYPE=37 (Radio converter (meter side)) (driver mkradio4a) DEV=amb8465[00000000] RSSI=-103

My wmbusmeters version: 1.13.1-3

P.S.: driver mkradio4 and mkradio4a are unable to completely decode the longer telegram. The best option seems to be evo868 but still a few bytes are not being decoded (sample message here).