UE4 crashes when saving after umport to a large exterior scene

Hi all,
The project contains a number of large city exterior assets, and after importing one more scene (via Database) and pressing ‘save all’, the editior crashes after about 30 min saving process. In fact, it is a problem concerning limits for assets, scenes and scene complexity in general in UE4. Can we add as many assets as our PC allows us or we can face any UE4 limitations?
Lightmass is not used. Log file attached.
Thanks

260431-myproject6.log (100 KB)

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks

Thanks for reply, I have posted the ticket there already, in the same time as I posted it here