Hi all,

Have observed a weird issue with an Umbraco 7.14.0 site that I haven't come across before.

Media uploads in the backoffice seem to fail about 70 or 80% of the time. There's no response back from the server, the request fails with a net::ERRHTTP2PROTOCOL_ERROR.

• Size or type of file doesn't seem to matter
• Happens on multiple browsers (no common plugins, etc)
• Other Umbraco sites on the same server with similar version seem to work fine, I don't see any differences with web.config, etc
• I don't see anything in the Umbraco log file about the failed requests

Example of Chrome's console output:

VM6:1 POST https://www.example.com/umbraco/backoffice/UmbracoApi/Media/PostAddFile net::ERR_HTTP2_PROTOCOL_ERROR]
VM6:1 XHR failed loading: POST "https://www.example.com/umbraco/backoffice/UmbracoApi/Media/PostAddFile"

Looking at network tab, 0 bytes are transferred, the requests seem to fail after about 6 seconds.

Am thinking maybe some sort of hosting env issue, but not sure where to continue looking at this one. Has anyone seen something like this before?