i am having similar issues as of yesterday with blocks. it just send the path to the var, not the actual value. I am not using make, but, uncanny, I also see the var paths being passed in payloads I capture at my api endpoint.
It feels to me issue lies at vapi side not parsing the values into the placeholders
https://discord.com/channels/1211482211119796234/1211484481848873020/1320725299985514506