If the validation redownloads files, you can check which ones by going to:
\steamapps\common\Conan Exiles\ConanSandbox\Content\Paks
Sort them by date and see which were the ones re-downloaded (they will be with today’s date). Delete them fully and validate the integrity of the game files again in order to get a fresh hopefully not corrupted .pak.
The ones that seem to cause issues often are the sound paks.