it was during the invasion on I-Island and Uraraka just used her quirk on Deku and Melissa when the security robots showed up and headed for her

Uraraka: oh no

Deku: Uraraka!

Melissa: release your quirk and get out of there

Uraraka: I can't. If I do that, you might not make it to the top in time

The robots got closer as she got ready to defend herself. Two of the robots jumped and we're getting closer