There is no fix for the Zoom R16 latency yet, but this is a partial workaround.

Method

1. New Project
2. Record dry Track 1
3. Record dry Track 2 while listening to Track 1
4. There is ~1.3ms delay at the beginning of Track 2
5. Click Project, File, Track 2
6. Press down, Edit, Divide
7. Press Enter twice
8. Assign the B file to Track 2
9. Track 2 now has ~0.3ms delay

The problem is, if the latency changes, you won't know how much to chop off the .wav. Lots of tests are needed to see when latency changes and why to be able to predict. It'd be much better if Zoom chops the .wavs automatically in the firmware using real calculations. It can happen after you're done recording when you press stop.