same issue after copying the timeliner from one patch to another.
working with 34.2 x64
- create a timeliner somewhere and create some keyframes and save the patch.
- then copy & paste the whole timeliner node to another patch wich has been previously created and saved.
- save that other patch.
- reopen it.
- all keyframes are gone
guess its the same issue.
if you copy & paste the timeliner node via xml from one .v4p file to the other it will save the keyframes properly.
hope it helps to reproduce.