Renewals Working....Most of the time

The site is using Stripe to process payments. Membership is per calendar year. Every year we set everyone back to a pending member (Level 0). They will log onto their member dashboard and they are able to renew there. I have had three or four instances where stripe will process the card but the system is not promoting them up. In addition, the stripe payment id is not updating for the member.

The renewals work most of the time.

What may cause this? Could this be a communication issue between stripe and the server?

It’s possible. Although enabling logging (WP Dashboard → s2Member (Pro) → Log Files (Debug) → Logging Configuration) is not recommended for a production site that is what you need to do to get to the bottom of this. Depending on how “intermittent” the problem you might be able to trigger it by submitting some test transactions, but that’s really hard to say.