One thing to help debug would be to run "snap changes" on the system when its in the broken state right after seeding.
If you can see the change where it tried and failed to install the seed snaps, run "snap change $id" to get a log of what it tried to do and where it failed.
One thing to help debug would be to run "snap changes" on the system when its in the broken state right after seeding.
If you can see the change where it tried and failed to install the seed snaps, run "snap change $id" to get a log of what it tried to do and where it failed.