Probably. Also that yoke looks way too thin for a bike like that, it has no resistance at all against bending from side to side. Making it an easy target for metal fatigue..
I just read on instagram that he had had the frame metal plated.
That is some shoddy engineering..
And you're right. The plate could've used some additional reinforcement as well!
It looks like the builder let the yoke get too how when he welded it and the material became too brittle.