Despite the fact that the mode of the structure block is not metadata, it was rendered as if it had a mode change if it was given to the enderman using the following command.

/summon enderman ~ ~1 ~

{carried:255,carriedData:0}

/summon enderman ~ ~1 ~

{carried:255,carriedData:1}

/summon enderman ~ ~1 ~

{carried:255,carriedData:2}

/summon enderman ~ ~1 ~

{carried:255,carriedData:3}

Also, after using the /testforblock command after changing the mode, the data value corresponding to the mode was output like 1.9.

Are these bugs?