I am using a custom application event (ackRequest) that I use to validate all components in a page. This event is fired in the afterRender of the community layout component.
The event is handled successfully by all components except one. The handler on all components does the same... trigger a second application event (ackResponse).
The one component that does not work throws this warning in Chrome:
HTTP-Based Public Key Pinning is deprecated. Chrome 69 and later will ignore HPKP response headers.
All my components are on the same API version. For strategic reasons, I'm using version 38.0 with Locker Service turned off.
Any ideas why this might be happening or how better debug this event?