This couldn't be related to Composr - we can't corrupt or hide tables.
The tables will be there, maybe you're looking for the wrong prefix, or in the wrong database, or there's something confusing about the SQLYog UI - but I've never heard of tables completely disappearing.
MySQL does have a bad habit of corrupting tables from the slightest MySQL crash / hard reset.
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#2307 - Git: Crashed table and no way to repair
The tables will be there, maybe you're looking for the wrong prefix, or in the wrong database, or there's something confusing about the SQLYog UI - but I've never heard of tables completely disappearing.
MySQL does have a bad habit of corrupting tables from the slightest MySQL crash / hard reset.