Referer Header not being passed causing HTTP 401 error

[sachin-tive]

TANGRAM VERSION: 0.21.1 (latest)

ENVIRONMENT: Windows/Latest Chrome

TO REPRODUCE THE ISSUE, FOLLOW THESE STEPS: We are using HERE maps with tangram tiles and when we whitelist certain domains on HERE portal, we are getting 401 error and that's because the referer header is not passed/populated to HERE and the requested is rejected. The sample on their site for tangram behaves the same way, which seems like there is something not correct with how the requests are made.

Go the below url and open dev console to duplicate this error: https://heremaps.github.io/here-vector-tile-examples/tangram/