Version: WikipediaApp/18.104.22.1685 (iOS 14.6; Phone)
When saving an article, you click on the icon (looks like a bookmark) on the bottom and normally the icon will turn blue instead of white, signifying that it's been saves. But sometimes when I an trying to save an article, the icon will not change color, which is confusing and can be frustrating. This tends to happen when I open different Wiki pages via hyperlink in whatever current page I'm reading.
Examples: "social alienation" is properly bookmarked, but the "social relation" bookmark doesn't work. "Social relation" was opened via hyperlink on the "social alienation" page.