Created attachment 220419 [details]
ZFS test stream (gzip'd)

Tested like so:
truncate -s 100M /tmp/zfs.1
sudo mdconfig -t vnode -f /tmp/zfs.1
sudo zpool create testtank /dev/md0
zcat test.zfssend.gz | sudo zfs recv -vd testtank
sudo zpool destroy testtank
sudo mdconfig -u md0 -d
rm /tmp/zfs.1

(test file is attached)

A bisect finds this commit is the culprit:
commit 46cdbe4a7a57c13eb35e99a5abea862ef346524f (HEAD)
Author: mmacy <mmacy@FreeBSD.org>
Date:   Sun Aug 12 00:45:53 2018 +0000

   MFV/ZoL: Implement large_dnode pool feature

   commit 50c957f702ea6d08a634e42f73e8a49931dd8055
   Author: Ned Bass <bass6@llnl.gov>
   Date:   Wed Mar 16 18:25:34 2016 -0700

       Implement large_dnode pool feature
...
Notes:
   svn path=/head/; revision=337669


I also tried creating the pool without features (ie zpool create -d) but no change in behaviour.

Note that zstreamdump does not have any complaints about the stream.