"Add Tag" action doesn't seem to work

Here is my rule, which has an action both to "Add Tags" and to move the subject file to a new location upon matching the specified criteria:

The trouble is that the file gets moved to the specified location upon a match but does not get the specified tag added.
I have three other rules similar to this (slight variation in match criteria for each one and different tag/destination path for each one), but none of them seem to be working as expected.
Does anyone have any advice or ideas what's going wrong here?

The trouble is that the file gets moved to the specified location upon a match but does not get the specified tag added.
I have three other rules similar to this (slight variation in match criteria for each one and different tag/destination path for each one), but none of them seem to be working as expected.
Does anyone have any advice or ideas what's going wrong here?