I have the same problem..
We are tracking for a demo, but without being able to do overdubs we can only record the drums at our practiceroom and have to record everything else at home or someone has to bring his old PC to the sessions an we have to use the Utrack24 as an Interface. Our Pc’s are old and so we have a lot of issues with computer crashes, drop outs etc..
The Utrack24 would be so much more usable as a standalonerecorder if you could do overdubs.
I hope this function could be considered for future updates!