[1.20.1] Villager mote trading gives up trading when a trade falls through

[Filiflo]

Made a hex that trades a list of motes with the following villagers.
The documentations state that the trades get run through when a villager trade is not accepted.
When I try to trade with [Potato, Wheat, carrot] on a villager who doesn't sell Potatos, the trade hex gives back null without trading the wheat and carrot.

[Filiflo]

It looks like trading with [Potato] with the potato villager gives back an error where it states that it expects a mote or an itemtype.

Trading with [Potato, carrot, wheat] and the index 0 for the first trade doesn't work either.

Maybe the docs mean to say that it accepts a list of motes for trades with multiple items.
This is not reflected in the docs.