This is a little bit buggy, but there is a workaround.
The best Knitted Knight Trial to do is Trial 2 Jumping the Queue.
You need to beat this level in under 40 seconds for the gold trophy.
Make sure you hold
to carry your partner, before the gate opens, and then once you finish DO NOT LET GO. Make sure you hold
until the results screen shows up with the gold trophy, and once the animation is done the trophy should unlock.