Missing Files when reOpening OPlan

I am Importing a project from OmniOutliner,
Simple List with Tasks…
all looks fine until I save … close and reOpen.
Half the Tasks are missing, loads of work down the drain …
I ve tried multiple times.
With Omni Server and only local Savings…
Seems like Omniplan has a major bug here ?
I am on newest update 3.9.3
What am I doing wrong ? Impossible that it can be that unstable !

Someone has same problem ?
Someone has options ?
Real trouble here…

@Eready Sorry for the trouble! If you haven’t done so already, could you contact our Support team so that they can look into this issue with you? They can be reached by email at omniplan@omnigroup.com or by phone Mon - Fri, 10am - 5pm Pacific at 1 (800) 315-6664 or 1 (206) 523-4152.

This isn’t an issue I’ve heard of before, but my initial hunch is that the problem may be related to where you’re saving your OmniPlan file.