Unverified50% confidenceFactExact time
The root cause is that the CDN caches based on the full URL, but Slack's link unfurling bot strips the query string before requesting the image in some clients, causing different content to collapse onto the same cache key.
1
Sources
50%
Confidence
Long-term
Relevance
10/17/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe technical principle of URL-based Transformation is that images are stored on a CDN, and when a URL with parameters is requested, the CDN edge node parses the parameters in real time, performs the processing, caches it, and returns the result.59% similarUnverifiedLink unfurling is a feature of collaboration platforms such as Slack: when a user pastes a URL, the platform's backend asynchronously fetches the linked content and generates a preview card.55% similarUnverifiedrobots.txt only controls whether crawling is allowed, not whether indexing is allowed; a URL that is disallowed from crawling may still appear in search results if it is linked from other sites (usually showing only the link without a snippet).55% similarUnverifiedPR #4931 addresses a symlink race condition issue in the UnixLocal file API.54% similarUnverifiedWeb端手势识别通常需引入MediaPipe的CDN链接，配合WebRTC的getUserMedia接口获取摄像头视频流，再通过Canvas API实时渲染检测结果53% similar
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