"The dreadful grey line in photo album: Just as last year’s 18.1 I have noticed the gray line tho thinner is back in iOS 26.1. It goes away in about 30 seconds and you can’t take a screenshot of the issue. It does not show up in the picture. Anybody else having this problem? It went away after a few updates and now it’s back. I have an iPhone 12."
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Lines in the Phot Album:
This seems to be an issue with the software, being it just goes away in a few moments. So, I recommend either clearing the System Data, or upgrading to the most-recent iOS. System Data contains caches, which are created for application so that they open quicker, and operate more efficiently).
A. Clearing System Data:
Use My User Tip: How to Clear "System Data" in your iPhone's Storage: - Apple Community
B. Upgrade to iOS26 iOS Using a Computer:
Use my User Tip: Update your iPhone Using a Computer - User Tip
IMPORTANT: If you have an option to update, however, then be certain you backup your iPhone first. That way, you will have something to restore your iPhone from should anything go wrong with the update