That's always possible, in which case enable wait for network in OpenELEC Settings. Remember this is an experimental feature - just disable it if it's a problem (touch /storage/.config/splash.disable).
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.