My guess you were running on 24.4.1 or 24.3.1 versions. Due those had on “Fixed or Known issues” notes about WoW and/or OW.
Giving the impression that each new driver were messing up with your settings, but were under the notes what they were fixing. Just happened to be what you were playing at the moment and you updating one to another.
Since OW2 release, both vendors released some driver fixes for it, while not often messed up with graphics settings, they often had some stability problem. In the WoW appears to be using newer APIs that required some driver adjustments, as game as service trying to keep itself fresh and with new tech is bound to some stuff happen.
Is more or less akin to Cyberpunk releasing and Nvidia launching like 8 Game Ready drivers one being way less ready than the other.
Or intel releasing driver updates to make huge performance improvements on games in a row.
Due games these days are trying to implement cutting edge tech, those games often get problems due not exactly having too much testing time on the bench. Diablo 4 and Diablo 2 R had similar issues with Nvidia newer gpus while older ones often were okayish. Similarly to the “recent” problems with AMD anti-lag+ feature and CS 2.0.
Just the industry trying to push unready stuff at accelerated pace. Although the driver cadency got a huge bump on frequency and speed to fix certain issues. MS Copilot and Recall are also things that recently got problems, similarly to other windows updates issues.
Eventually is bound to happen and nobody is safe from it. Each new update, both Windows and drivers I prefer to wait about 4-12 weeks to update. Having time to learn about it and the issues introduced by it.