Those six hours is the reason why temporary file aren't immediately deleted when cron tasks run. If then there are many temporary file to delete, a single run isn't sufficient to delete all the files.
I did a very quick test and if the Display format of the webform submission value is HTML then it appears but if plain text then it doesn't, so something is included regardless of if empty when...
Posted33 min 48 sec ago by Martin Price | System Horizons Ltd (yorkshirepudding) on:
Just to clarify it appears that the item: Fix Search for "On the Web" module, is about the search on backdropcms.org at https://backdropcms.org/modules
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The cron job system_cron() will delete temporary files after the max time stipulated by a constant (6 hours)
Those six hours is the reason why temporary file aren't immediately deleted when cron tasks run. If then there are many temporary file to delete, a single run isn't sufficient to delete all the files.