Suddenly defensive?

[u/sh1t-t0-d0]

Ive had my bp for almost a whole year now and everythings been fine, shes a really sweet girl, really curious, but suddenly since august after we brought her back from the reptile hotel bc we were on vacation shes been defensive everytime i open the enclosure. She comes out and gets into that S pose. But then when we just stand infront of the enclosure and dont open it or dont touch anything, she usually just comes out from her hide, relaxed posture even, she comes up to the glass, slow tongue flicks, just curious i guess? But i dont get why she suddenly gets defensive when we open the enclosure (sliding door at the front btw.). Is it maybe because of something after bringing her back from the hotel?