Developer fixes Raindrop bookmark cache bug after finding offline app unusable

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A developer participating in DEV's Summer Bug Smash challenge discovered a caching flaw in the open-source Raindrop bookmark manager desktop app while reorganizing thousands of saved links. The app was found to be completely unusable without an internet connection, prompting an investigation into the underlying codebase. Using an AI tool to analyze the architecture, the developer identified that Raindrop's bookmark cache uses a key-value store where multiple non-collection routes — including filters and tags — all collapse onto a single shared key, causing bookmark lists to overwrite each other on every switch. The bug was formally reported as issue #253 in the project repository. The developer subsequently worked on a fix by running the dev server and iteratively submitting code changes for review.

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