Perhaps if the entrance had a wedge shaped ramp at the top guiding them in? I mean, design not meeting the needs of the bees isn’t exactly the bees fault.

Humans: Look how stupid bees are for not being able to gracefully fly into this tiny opening we made for them.

https://www.vice.com/en/article/78kwdz/bats-crash-into-each-other-all-the-time-high-speed-cameras-reveal