Girl's Behavior

Why would she ignore me then act like nothing happened?

There’s this girl and I felt like she was maybe slightly flirting with me before. Maybe she’s just a flirt or that’s how she is but we work together and she helps me do stuff and when I had to stand on a chair she helped hold it for me and told me how strong she was and she also called me cute before. We were doing trash together and I told her I never had to do it before that and she was like “it’s because you’re cute”. I also felt before she would look for any excuse to talk to me. They took the mask policy off at work and we no longer wear masks and today was the first day we saw each other without masks and I caught her glancing at me when she walked in and we made eye contact then I looked away. Then when she came back out I caught her glancing at me again and I mouthed the words hi and she kind of looked jumpy slightly nervous and just left to a different area of the store to talk to the manager. She kept coming near me today but wouldn’t say anything at all. It was so weird. I know I’m pretty without my mask lol like two people called me gorgeous and I do get that frequently from a lot of people. Today I saw her again and she said hey to me first in a cheerful way. I don't know maybe she felt bad from last time but she’s acting super weird. We’re both girls by the way lol what’s wrong with her?
Why would she ignore me then act like nothing happened?
Post Opinion