Why do some RSVP block responses not get recorded?

I added an RSVP block to a campaign. When I sent the results around, ~ 5% of the members said they selected a button, but it did not register in the report. Does anyone know what is happening?

4 replies
Free September Webinar

Join us for this free, one-hour webinar to build a proven email marketing strategy that takes the guesswork out of creating email campaigns that deliver real results.