You report things with the DAW in the mix, which of course adds extra buffers etc. Let me give you an alternative measure, by simply using the sync shift on my sample accurate clock to get it in time with a Eurorack drum module (I usually just use impulses or rim shots).
I found about 8-9 ms with the “layer gen” setting off, and about 50 ms with it switched on.
Like you, I am puzzled why the latency is that high. The TR8s has about 2.2 ms.