Can't use jira priority icons inside customUi application

Hi!

I develop CustomUi app. And i need to show priority icons inside.

There are priority icons like:

Which i get via issue info from /rest/api/3/search

customUi app renders via iframe like

https://SOME-LONG-HASH.cdn.prod.atlassian-dev.net/eeed2cf3-6cea-4edc-9855-77161fd9dd8c/SOME-LONG-HASHES

But priority images has header

strict-transport-security: max-age=63072000; includeSubDomains; preload

And icons are not visible in my app. I guess this header the reason.

Jira devs could do something with headers?

I don’t want to copy icons inside project because it’s hardcode and user could add custom priorities.