upgrading 15-current to 15-alpha2 zpool does not automatically load

From: void <void_at_f-m.fm>
Date: Tue, 16 Sep 2025 02:20:31 UTC
Hi,

In upgrading a non-root-on-zfs system from 15-current of around three
months ago to stable/15 (what was built was alpha2) via source upgrade,
I found the zpool didn't automatically load. I loaded it manually after
it booted with 'zpool import -a'.

Is this expected?
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