Variable substitution

Hi There,

I have an api request that uses Environment Variables:

Both variables are defined and with an initial value, if I hover on the Request URL I can see that both {{endpoint}} and {{projectId}} are correctly evaluated by the tool.

When I send my request, only {{endpoint}} is correctly substituted with my initial value, for {{projectId}} Postman assigns a random value (12345678901234567890123456789012).

Any clue why this is happening?