I have an issue with an app running in Internet Explorer 11 which makes an external API request to amplitude.com and returns an 504 GATEWAY TIMEOUT error - this causes a long delay in the page (it will sometimes crash) and returns the following in the console.
SEC7120: Origin https://live.mysite.com not found in Access-Control-Allow-Origin header.
live.mysite.com
SCRIPT7002: XMLHttpRequest: Network Error 0x80700013, Could not complete the operation due to error 80700013.
live.mysite.com
When looking at the network tab I can see that this request has posted When loading the same site in Chrome/Firefox it works perfectly fine (no delay issues)
When trying the same in Microsoft Edge it appears to work fine - any ideas why this may be the case?