DIetPi v6.x very slow on NanoPi NEO

Since upgrading to the “new” release cycle of 6.x my installation on NanoPi NEO is very slow/unresponsive. SSH connections are terribly slow and will ignore some keyboard inputs so it’s not really possible to work with it.
It only runs pihole and has a very low load average. The pihole dashboard loads just fine.

Everything was fine when i used the v144 and what they were called…
What happened - what has changed?