@Devil-Strike one last thing - when filing the bug report, can you use the piotrasd build since this is based on the drm-intel-next kernel, not 4.9.0.
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.