I did this job for a customer, it's basically wings to be laser cut
from Corten "rusty material" anyway I hatched the file on layer hatch
and turned off layer 0 and took a screenshot to let him see roughly
what it would look like...
When i closed and re-opened the file the hatch had parts missing
almost like it tried to hatch the openings rather than the part itself.
See screenshots and file to try out for yourself... by the way it didn't stop
me from supplying the laser file as they don't require the hatch but just
wondered why this was happening?
Still very happy with Qcad.. I've now uninstalled AutoCad

QCAD Professional [ Running on Windows 10 ]
Version:
3.24.3.0 (3.24.3)
Build Date:
Mar 17 2020
Revision:
a3bef72
Qt Version:
5.13.0
Architecture:
x86_64
Compiler:
MSVC++ 14.0 (2015)