@sarah.krasnik.prefect thanks for the heads up. Looks like the technical support team worked with you on this and they’ve escalated this to engineering. Hope it’s ok with you if I keep updating this thread while you get help so it also helps out our other community members. 

Update: this is resolved.

First, I had to update the customerio mapping to email instead of userId, as that’s how our customerio instance is setup.

Second, there was a bug on Amplitude’s end where properties with a `.` in them failed (ex: we had an event property called page.title). This was resolved and a fix was pushed.

@sarah.krasnik.prefect thanks for sticking with this and posting your update here! @Esha and you are our customer.io integration rockstars!!

Thanks @Esther Trapadoux ! The Amplitude team rocks!

@Esha you make us better!!