Just sent an hour or so doing automation on several tracks in a project - mostly volume but with a little panning and effects turning on or off. I saved at various times during making changes. Once I was reasonably satisfied I did a Mixdown and saved and quit. Listening to the mixdown on another audio system I noticed no automation was present ! I opened the project and sure enough all automation was gone - though the automation lanes themselves were there.
I went back to the last two Autosaves where most of the automation should still be present - but that was gone too. I rebooted (windows 11) just in case but still the automation was gone.
So something happened immediately prior to performing the Mixdown that killed all the automation. I don’t think I did anything to delete all of it - certainly the auto saves should have been good.
Suggestions please?