I made one about how my toddler child couldn't climb in girl's TODDLER PANTS.
We are not a house who cares much about gendering a baby's clothes. It's a BABY. It doesn't care. So we'd take the kid to yard sales and let them pick out whatever baby clothes caught their fancy and would fit. Some were 'boy' and some were 'girl'. Kiddo loved floral prints because they're a baby (yeah my kid has always picked their own clothes).
Anyway, my kid LOVED TO CLIMB. Sometimes.
It was weird. Sometimes they were all over the sofa and the playground equipment and MY LEGS and sometimes they just. Weren't. Couldn't figure out what was going on.
Until I caught them trying to climb on rhe sofa in one of their pretty flowered pants.
They COULDN'T LIFT THEIR LEGS PROPERLY. And gave up, and did something else.
So I tested this out and... Yeah. The kid COULDN'T climb in ANY of their girl pants. Any. Put them in boy clothes and suddenly the kid is on everything again.
We stopped buying girl pants completely until they were old enough to test them and my kid is a TEENAGER now and i still make them lift their legs individually and jump if it's a girl fit.
YOU DON'T EVEN HAVE TO MEAN TO DO IT.
Whoever designed these clothes literally did not care if the baby could MOVE. But only if girl.