Dozens of items removed from my inventory with no explanation from Amazon

Have had the quietest Christmas ever in 16 years of trading on Amazon. Looking at my inventory they have removed most of of best selling items which are wall plaque. They have left mostly the Silver option and removed the much more popular Gold ones. I am trying to resolve why they were removed and they keep asking me to for ASIN's for FBA inventory but none of these have ever been an FBA item. Has anyone had a similar experience? There is nothing in my Search and suppressed inventory so I don't know where these items have gone