When inserting a substring/suffix/prefix indexed-encrypted field value, the set of tokens sent to the server in an insert/update payload may contain multiple "padding" tokens all having the same values for the ESC/EDC/Server/encrypted tokens. Currently, the server does not handle multiple duplicate padding tokens properly and ends up inserting the same document _id to the ESC. The server should be able to identify the padding tokens, and if there are multiple, increment their assigned counters accordingly.