Help pls -cubase freezes after export

hi guys!
can anyone help ???
using c.11 pro on windows 10. 64 bit.(pro)…
after exporting my work cubase freezes and i cant move anything i have to ctrl+alt+del to exit using task manager…
the file is exported with no problems…
i had this with 10.5 but cant remember what fixed it …
anyone know wtf is going on ?
thanks in advance.
T

anyone ???
should i maybe share a dump file ?