I did that for a while. To make it work, I changed the following file:
nano /usr/share/perl5/PVE/Storage/ZFSPoolPlugin.pm
- my $cmd = ['zfs', 'send', '-Rpv'];
+ my $cmd = ['zfs', 'send', '-Rpvw'];
But after a while, there were damaged volumes. So I disabled it again. An alternative would be...