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CSS Grid is a modern, two-dimensional layout system for websites and applications that allows developers to easily create complex designs with less code and greater flexibility. Despite offering an intuitive and powerful way to work with layouts, the use of CSS Grid can sometimes be a source of errors that may lead to undesirable results on the page.

Identifying CSS Grid Layout Issues

1. Inconsistencies in Display Across Browsers: Different browsers may interpret CSS Grid differently. Using tools like Can I Use and CSS Grid Inspector in browser developer tools can help identify and address compatibility issues.

2. Improper Usage of Grid Container and Items: A common mistake is incorrectly defining the grid container and its items. Ensure that display: grid; is applied to the container and not to the items themselves.

3. Errors in Grid Rows and Columns Definition: Ambiguities or errors in defining grid-template-rows, grid-template-columns, and grid-area can lead to unexpected layout behavior. The use of units such as fr, px, %, and vh/vw should be consistent and carefully planned.

4. Overlapping Grid Items: If grid items are improperly defined, they may overlap. To address this issue, use the grid-column and grid-row properties for explicit item placement.

Fixing CSS Grid Layout Problems

1. Utilize CSS Grid Inspection Tools: Most modern browsers offer tools for inspecting CSS Grid, displaying grid lines, areas, and other useful information for debugging the layout.

2. Ensure Cross-Browser Compatibility: Use autoprefixer in your build process to automatically add vendor prefixes, improving compatibility across browsers.

3. Step-by-Step Debugging: Start with a simple grid and gradually add more complex elements. This will help identify exactly where the problem lies.

4. Utilize CSS Custom Properties for Flexible Design: Using CSS variables for repetitive values can facilitate adjustments and increase code readability.

CSS Grid is a powerful tool for creating web layouts, but it requires careful usage and testing, especially regarding cross-browser compatibility and precise grid definition. By using inspection tools, ensuring compatibility, and methodically debugging, most CSS Grid layout issues can be addressed. With these practices, you can create responsive, flexible, and visually appealing layouts that work across all modern browsers.