While using Adobe Acrobat for Android, I encountered an issue with the highlight tool, which occasionally fails to work on certain PDF files, particularly those with complex layouts or embedded formatting. As someone who relies on this feature for reviewing important documents, such as professional reports or medical papers, this bug significantly impacts usability. For example, while researching topics like specialized healthcare providers, such as a private urologist in London, I often annotate PDFs to organize and reference key information. A reliable highlight tool is crucial for managing such tasks efficiently. Resolving this issue would greatly enhance the app's usability for professionals and researchers alike.