Date Slicer removing all data from visuals

I have a table of data with a date field (last modified date). This field is linked in a one-to-many relationship with my calendar table, however, when I use the date field from the calendar table in my slicer, the data from all the visuals disappears. 

Before: 

After: 

I cannot figure out why this relationship is breaking my data.

I even have another table with similar data, also connected to the calendar table via a date field, and those visuals are remaining intact. Does anyone have an idea of what might be causing this, or a proposed solution?

Facts:

- date fields are not generated functions, they are raw data in date/time format

- both relationships are many-to-one from data table to calendar table, single filter

- the two tables are not connected to eachother directly, but have mutual connections to other tables in my model, but not those date fields particularly