I purchased a lifetime membership to use Meta Box instead of Toolset. Part of my decision to go to MB was that it has a plugin to migrate data to MB from Toolset.
It did not do the job as expected.
I posted here a couple of days ago and have had no response at all.
If there is some reason I would appreciate some advice about that.
I've informed the development team to check the issue and get back to you later. If you have a staging site, please share it via this contact form https://metabox.io/contact/
I will take a closer look.