Upon further inspection, this behaviour seems to be the same on Android as well (but more smoothly - where there’s a slight transition into the stutter, not just a skipped couple of frames like on iOS).
Unsure if this is related to the Fast Resume issue.
Some other useful articles
The issue I’m facing however is not the screen going blank as outlined in above articles, but rather a one-time stutter (couple of frames skipped) when the app is reopened.