Do you think it’s possible to switch?

So, I know for a fact that attachment styles are somewhat nuanced and also changeable through life, depending on experiences etc. I also know that it’s not rare that people will say for example “I’m a DA but turned anxious when I dated someone more DA than me”. I’m also well aware of push/pull dynamics. None of these is what I’m talking about.

I’ll try to make it short, but I’ve had a relationship before knowing AT and I’d certainly think of myself as anxious if asked back then. It didn’t reflect in any other area of my life, I’ve always been textbook avoidant but in that specific relationship I caught myself craving for her affection, constantly trying to address the fact that she was distant. We lived in the same city and she never even wanted to spend the weekends with me, and I remember feeling hurt, and she didn’t seem to care. I was deeply in love and couldn’t picture myself without her, even though I was suffering. This went on for about 8 years (so a pretty consistent pattern) and then I fell out of love. I didn’t break up with her right away, but I moved to a new country and just kept busy and honestly couldn’t be bothered to give her attention. We continued LDR though.

At this point I’d expect some insisting (classic push/pull), but that’s not (only) what happened. She actually became a total anxious mess instead, I was shocked to witness. Would call me sobbing, write big blocks of text, offer to move to the same country I’d move to. I’d even perceive her a bit afraid to voice her needs to me at times because my reactions were honestly rolling my eyes or asking to talk about it later. She wanted to be sweet and affectionate and would start crying mid-sentence because of my lack of enthusiasm for her. She wanted to share things about her childhood, go to therapy, do whatever I wanted her to in order to make it work. She lost a lot of pounds because she was so sad/anxious she couldn’t eat (she told me that). This lasted for about 1.5 years, so it was a really consistent change too, until I knew I really had no feelings left and just broke up and we never spoke again.

ANYWAYS. Do you think it’s possible that attachment styles trade completely and consistently from one partner to the other during a relationship? I also do not see anxious traits in myself besides those years in that relationship, so I still try to understand what the hell happened there and I sure did not expect this shift on her side.