Alright, so that confirms my suspicion this is related to initializing a Recorded Game file, which was an issue for some players in the legacy game as well. The root cause/solution is unfortunately not quite so clear.
The thing about DE is, it actually always creates a Recorded Game file for multiplayer games, because it is required for the new spectator mode. Even if you disable the option, a file will still be created; the only difference is that it won’t be preserved and gets overwritten the next time you play a multiplayer match.
Considering the above, DE dev team should really try to get this long-standing issue resolved, because the old workaround of not recording games is not actually possible on DE, therefore the issue affects more people.