Hi,
what was been the export and import command you used? When importing did you choose a parent community? E.g. when using AIP
"... Notice that unlike -s option (for submission/ingesting), the -r option does not require the Parent Object (-p option) to be specified if it can be determined from the package itself. ..."
But as the note says IF it can be determined: I had to specify the parent in the past most of the times. What I did when doing it via AIP was to
BR
Maruan