I don’t believe that to be the case, and I don’t expect it to be related to your issue.
As I understand it the Prerendering just sometimes results in 500 errors.
If you search you’ll find many threads raising it, here’s a few:
https://answers.netlify.com/t/netlify-pre-rendering-and-5xx-errors/64329
https://answers.netlify.com/t/sporadic-http-500-errors/143383
https://answers.netlify.com/t/google-wont-index-my-site-due-to-netlify-server-errors/118534
You’ll be able to find more if you search yourself.
That said if you are on a ‘Pro’ plan you can use External Services.