Linked filter dropdown values loading indefinitely

I have a field filter in a dashboard that should show the distinct values in a column. It is also a linked filter to two other filters on the dashboard (limiting values for the filter in question). Instead of showing a dropdown of possible values, it loads (spinning circle) indefinitely. It's set up as per guidance ('category', discarded cache etc)

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I should add it loads immediately if the linked filters aren't set to anything

if a filter is linked filter then metabase will generate a list of values specifically for that linked combination. So that spinning is actually the query getting sent to your database. At some point it shoudl return those values and cache them.

What version of metabase are you running?