@C-townladiesmanYou mean when enemy heroes generally recover very fast from knockdowns, not only Boba?
That's most likely because that other player has a much better connection than you, maybe add some server lag and instability and there you go.
Try going into melee against fast recoverers, you'll probably find out that you have a really hard time to counter their movements as their dodge and attack animations will look unnormally fast too.
In one match some player said that once about me, so there's that. From my point of view it just looked like that player always failed to take advantage of me being knocked down because of... running to late or being too slow for some reasons? Idk, was weird anyways.