TMM instances: v11.3.0 and v11.6.0

According to SOL14358: Overview of Clustered Multiprocessing (11.3.0 and later) ( https://support.f5.com/kb/en-us/solutions/public/14000/300/sol14358.html 😞

Platform            Processors      TMM processes TMM threads

...

VIPRION 2100 blade1 Quad-core       (+HT) 1       8

On my hardware:

On v11.3.0:

tmsh show sys tmm-info | grep Sys::TMM
Sys::TMM: 1.0
Sys::TMM: 1.1
Sys::TMM: 1.2
Sys::TMM: 1.3
Sys::TMM: 1.4
Sys::TMM: 1.5
Sys::TMM: 1.6
Sys::TMM: 1.7

On v11.6.0:

 ps T | grep tmm | grep T
22064 ?        S

Does anybody know the reason for this change? Is there any documentation about this? Or is there something wrong with my hardware?