Yeah this seems common. I had a friend who grew up with parents who alternated between English, Portuguese, Italian, and French, and he told me he wound up not being able to speak at all until he was over 2 years old. It didn’t affect him badly later on, and he always insisted it was worth it
I enjoy the idea that some shitass mason hated whatever king hired him, built all the stairs as quickly and poorly as possible, and then to save his ass later had to be all “oh hmm yes the stairs? That’s a feature actually” and somehow it winds up catching on