Thank you for your report! I noticed a few issues while I was testing this. Please check your private messages.
I replied !
There is another issue (or deliberate behaviour), if you are not in one of the Velocity reading mode, the velocity channel isn’t loaded.
This could be nice when you want to bake a precise animation and still be allow FX guys to use the velocity to emit things or feed the velocity to a shader later on !
Thank you for your suggestion! I added it to our wish list.