Today I learned something new. While swapping connections across sites one of my filters stopped working.
When looking into it on the worksheet I couldn’t figure out why, and when showing the filter Tableau was telling me that the filter wasn’t available.

This was because Enable Auto Update for filter as disabled.
I switched it on and my filter came back to life.
Two ways of enabling this.
Right Click Filter > Enable Auto Update

Or
Click Analysis at the top > Quick Filters > Enable Auto Update

Hope you find this useful
Thanks for reading.
David