Slicer doesn't have option for dropdown

[HannahP]

I tried adding a slicer for a text field and I want it to be a dropdown, but there is no option in the slicer settings. It looks like this:

Other text slicers on the same page show this:

 

Other slicers also have a little arrow near the three dots I can use to change the type, but this one doesn't have the arrow:

 

 

[prudvit]

That is Strange , Try the Following
1)Get the Table filter first put the department column and then convert it to slicer
2) create a new pbi with the same data and try to do the slicer, if it works try copy and paste to the Existing PBIX
3) Department column -> make sure it's text in both power query and power Bi 
Or please try and give more details about the Dataset

[Data-estDog]

Provide more details about the column. Example:

[HannahP]

Here's the column info:

[Data-estDog]

Can you show me what the data for department looks like?

The only time I have seen this is the actual data is wacky.

[HannahP]

It's just text of department names. The only thing that may be unusual is that some of the departments have / in their name. Do you think it could be because it's a special character? 

I just tried changing the slashes to commas and it still didn't work.