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This happens when the previous selection in the child filter is no longer available as an option because of the change in the parent filter. So, in your example, Model AF9000 was selected in the Model filter but when you change the Test Date filter, there are no entries for AF9000. Unfortunately, at that point Tableau doesn't know what to do. So it puts the parenthesis around the value in the sub-filter to indicate that the selected value is no longer valid. Personally, I would like to see Tableau reset the sub-filter to "all" in that case...but it doesn't. :-) I don't know of any workaround for this situation.
@Stuart Filed House & Jim Dehner,
Thanks for you response. I will check this and update you.
I would be so thankful if i get assistance for this doubt also.
Do you have any findings for this questison? I have the same question now, if you can find the solution, that will be great helpful to me.
Thanks in advance!
What Stuart said above is correct. This happens when the previous selection in the child filter is no longer available as an option because of the change in the parent filter.
Best way to handle this would be always save your dashboard with "All" selected for chid filters. This way if you change parent filter, you will not get any value in brackets and list of values in dropdown will be updated to reflect all values based on parent selection.
Thank you. Yes, I'm going to use the stuart suggested way.
I'm following the stuart suggested way. Please reply me if you want any information about it
Thanks & Waiting for your reply.