Revolving Planeswalk (ONE), white node.
First objective (cast 3 or less supports) counts spawned supports (e.g. AjaniPMA’s loyalty abilities) as cast.
Also, Toxic counters created by your opponent are counting as casted supports.
Sounds like PMAjani is on the naughty step in this event.
Nice to have players try something different. But it does sound like a bug the should be fixed
Hello guys,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca.