Issue with remote/proxied emojis not displayed

[RetroYogi]

I have installed an instance of Misskey and almost everything works well except emojis from remote instances are not displayed.

Here an exemple of a note cached on my instance that shows the issue and here the same note cached on an other instance with emojies displayed correctly.

I installed Misskey in a docker container and use apache as a reverse proxy (not nginx).

I tried doing some troubleshooting and realised that the non-working images use HTML URL encoding schemes. All other URLs in the source code of the page are displayed "normally". So I decided to change the image source URL using the Chrome Inspector. I replaced the "%2F" with "/" and the "%3A" with ":". And the emoji showed up correctly on the page !

URL before: https://i.imgur.com/5b8XoCZh.png

URL after: https://i.imgur.com/aaykssch.png

Does any one have an idea what could cause this and how to fix it?

[RetroYogi]

Found the issue :) It was indeed related to the URL encoding.
I added AllowEncodedSlashes On to my Apache Virtualhost. It also works with AllowEncodedSlashes NoDecode and might even be a little faster. The default if not defined is Off.

The problem was that I googled for a misskey issue and therefore didn't find an answer, but there are answers if you search for apache encoding issues :) here the pages which helped me resolve it:
https://serverfault.com/questions/715242/encode-url-wihthin-url-apache-mod-proxy-proxypass
https://httpd.apache.org/docs/2.4/mod/core.html#allowencodedslashes

I hope this might help some other weirdos running docker containers with apache as reverse proxy ;)