Angular developers frequently encounter change detection glitches, such as template fields that fail to refresh. When the issue surfaces, many turn to AI assistants like Copilot, which often recommend calling detectChanges() or markForCheck() as a quick fix. In practice, these calls rarely address the underlying problem.

detectChanges() forces Angular to run change detection immediately for the current component and its children, while markForCheck() merely flags the view for the next cycle. With ChangeDetectionStrategy.Default, every component checks each cycle; OnPush limits checks to new @Input references, async‑pipe emissions, template events, or explicit calls. zone.js already triggers detection after async operations, making manual invocations unnecessary in most cases.

Typical anti‑patterns include mutating @Input data inside a component and then invoking detectChanges(), or pushing items into an OnPush input array and calling markForCheck(). These shortcuts mask flawed data flow and architectural decisions. Developers should favor immutable inputs, the async pipe, and proper parent‑driven state updates, and always verify AI‑generated suggestions before applying them.