Update 1.8.4.1 was an update released for Obduction on November 7, 2019. This update disabled support for HDR.
1.8.4.1 Minor update
We've pushed out a small update today to address the issues that were being caused by HDR. After quite a bit of discussion, looking at our options, and finding out what we could do with the small amount of time and resources we have, we've come to the conclusion that we'll have to disable support for HDR for the time being. We'll post an update with news if or when we're able to revisit this issue.
References
https://steamcommunity.com/games/306760/announcements/detail/1613905751067737559