Looking for a lead in order to link funnel dropouts and with website bugs

i am trying to analyze customer experience from a different perspective: killer bugs and website bugs in general.

I am struggling to find practices and/or literature on the subject. I'd like to use data logs and funnel analysis to find if there is a correlation between dropouts and bugs on the website (i'm pretty sure there is). Is there anyone that can point me to a book, a whitepaper or something to better understand how i can approach this matter? Also if you can point me to a different and more appropriate board that's okay. The context is onboarding and subscription of financial services, but at this level is not much relevant.

Thank you in advance