# Preview Images Out Of Date

**URL:** <https://forum.snapmaker.com/t/preview-images-out-of-date/44028>\
**Category:** U1 Toolchanger\
**Tags:** Firmware, Bug-report\
**Created:** [November 3, 2026, 7:26pm UTC](https://forum.snapmaker.com/t/preview-images-out-of-date/44028 "2026-11-03T19:26:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CrazyIvan](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@CrazyIvan](https://forum.snapmaker.com/u/CrazyIvan)\
**Post date:** [November 3, 2026, 7:26pm UTC](https://forum.snapmaker.com/t/preview-images-out-of-date/44028/1 "2026-11-03T19:26:48Z")

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From the U1’s home screen, click ‘Start’ to get a list of print files available, with previews from the images embedded in the G-Code.

However, the actual image seems to be from a cache. If the filename happens to match an existing previous file, even if that file got deleted rather than over-written, the cached image is displayed not the image from the actual file.

It’s a speed-up to have a cache, but the cache entry needs to be voided under some file management situations (when a file is deleted, or over-written).

Is there a means to force the cache to update – ie re-scan a file? I couldn’t find one.

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**Author:** ![Zoe\_M](https://avatars.discourse-cdn.com/v4/letter/z/8491ac/32.png) [@Zoe\_M](https://forum.snapmaker.com/u/Zoe_M)\
**Post date:** [November 4, 2026, 4:00am UTC](https://forum.snapmaker.com/t/preview-images-out-of-date/44028/2 "2026-11-04T04:00:12Z")

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Hi, I checked with the engineer, and he explained U1 needs to be restarted for now to clear the cache.

He also mentioned this will be optimizied in the next firmware upgrade.