WebUI Pool Status empty

Hello, i found the following bug in the current Truenas Core 12 Beta 2.

The WebUI just shows a empty table that normally would show the topology of the pool.

i looked ad the websocket traffic and there the following message came in:

https://pastebin.com/eQyt8N9X 

it worked in 11.3 with the same pool topology

My guess is that this has something todo with the indirect vdev that is a leftover from the removal of a top level vdev (fairly new feature)