Importing project missing merge requests, pipeline history

I’ve been trying to move projects from our self-hosted gitlab (v14.1) to gitlab.com. I’ve done this by exporting the project, then importing it.

Half of the projects I’ve imported are missing all the MR history and pipeline history. The exported projects range in size from 1 MB to 1 GB - but the size doesn’t seem to make a difference. I’ve read through the following issues that all say the issues is resolved, however this isn’t the case for me.

• Issues with large project import - missing pipelines, avatar, and issue boards. Exceptions not logged. (#254990) · Issues · GitLab.org / GitLab · GitLab
• Fix missing Merge Requests on Project Import (#285488) · Issues · GitLab.org / GitLab · GitLab
• in-flight project imports are deleted by import_export_project_cleanup_worker when disk (not object storage) is used (#332313) · Issues · GitLab.org / GitLab · GitLab
• Increase the IMPORT_JOBS_EXPIRATION limit (#333252) · Issues · GitLab.org / GitLab · GitLab

What can I do to get these projects moved into gitlab.com with their full history?

Thanks

Same issue, migration is basically useless without any of these items. Why does the import say that it has completed successfully when it very clearly has not? Why are you holding our data hostage? And why has this issue not had any response for over a year??