Hi @Anonymous ，
Could you tell me
1）the data type of Distributionslister field?
is this field's structure like this: {Id:.....,Value:....} and a lookup field?
2)what does the formula use for?
I assume that:
The Distributionslister field is a lookup field, and you want to get a table with two columns :Id and Value from the filtered items' look up field.
I've tested your formula and I think you need a little change.
Try this formula:
Filter(ForAll(OB_Roller_ComboBox.SelectedItems.Value,LookUp(Roller,Value=Title,Distributionslister)),
!IsBlank(Value))
Then you could already get the nested table's value, no need to use two ForAll functions and Ungroup function.
About why the formula works in your previous version, PowerApps is updating all the time. The formulas that you use may be out of time.
Best regards,
