Why is my Oppo A74 4g is boot looping?

My Oppo A74 4g is boot looping and I'm thinking of is it because of the battery or the stuck button but because this happened also in the past couple months when the time that the button is still not stuck so I think it is because of the battery but I could be wrong though... So about my buttons should I replace the button flex or just clean and adjust the button in middle frame?