I have 2 midi devices in serial connection each using its own (but identical) time control (metro>transport), and it turns out that the timing of the second device is *early* in relation to the first.
The patch below generating a note on every beat may be used to reproduce this behavior. Just build a device from it and load the device twice on a midi track. As instrument load some drum sticks, for instance operator preset 'Sidestick-808'.
When running you'll notice that the timing doesn't match. For synced timing the delay parameter of the second device must be adjusted (about 12ms).