I did the following and was still unable to reproduce the issue:
- connect to a German server on my VPN
- create a fresh Orion profile
- create a fresh reddit account
- go to https://reddit.com/r/all and scroll down
As can be seen from the video below, I did not encounter any ads.
Upon further review, I also tested changing my localization and interface language to German on reddit. That did not change the behavior in any way.