Assume that you have a table that has lots of rows and a full-text index in Microsoft SQL Server 2014. When you try to delete lots of rows from the table in a single transaction, a schema lock occurs as a part of removing the rows from the full-text index, and all the other manipulation queries are blocked by the delete operation.
The issue occurs because, when you delete lots of rows from a very large table with a full-text index, the delete process on the full-text index is performed in a nested transaction. Delete for the full-text index can take longer time even though the delete finishes quickly for the rows in the base table. This reverts all progress of the delete operation on the full-text index if the server is shut down or restarted. It also leads to too much blocking on the base table and lots of transaction locks.
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.