Recording Electron Rytm MkII (and other external gear) in Synk [Live is synked to Rytm]

[Designbureau]

Our issue:
Recording is always late.
To make it simple let's just talk about one external machine, the Elekron Rytm. When we record a simple test drum beat and metronome the recording is never in sync with the actual downbeat in live. it is always slightly behind.
I read a lot of posts on latency, monitoring On/Off, Reduced Latency when Monitoring, ...
But we must be missing the one thing.

Our Setup is simple:
We are using Live for recording only! External gear only! No software instruments. Live 12
That's why the main clock is an external hardware, the Elektron Rytm.
The Rytm is syncing Live* (and the rest of the Eurorack gear).

Latency is negligible: 128 Samples, In 2.67ms, Out 5.69ms

So the only thing that is particular is that we have an stand alone setup syncing and remoting Live.

*https://www.elektronauts.com/t/sync-abl ... bpm/232350

[Designbureau]

I made a little video :
Monitoring Off (makes no difference)
Recording simple snappy pulse and Metronom on 2 Audio tracks
Rytm launching Session recording after 1 bar (same problem in arrangement recording)

is this link public?

https://drive.google.com/file/d/1UZfPqB ... sp=sharing