Multiple Items selection Cascading drop-down - Not working

[sgrpdl]

I have two issues 

Issues 1: I have cascading drop down with name Project code and project name. I have used combox for both so that i can select multiple items. problem here is, if i select one items in project code, project name combo box shows the items but when i select multiple items in project code. Project name combo does not shows items for both multiple selecected items.

Issues Two: It is not updating multiple items in sharepoint. only one last selected items get updated in the SP list.

formula i have used are: project code

Items: Code.Activeprojectcode
update: ComboProjectCode.Selected.Activeprojectcode

Project Name

Items: Distinct(Filter(Code,Title=ComboProjectCode.Selected.Activeprojectcode),Projectname)
update: ComboProjectName.Selected.Result 

Any suggestion would be great

[sgrpdl]

Regarding Update: I solved it using concat

for other who too facing same:

Concat(ComboBox3.SelectedItems,Projectname&"; ")

but for multi selected cascading i am still struggling. I tried to use collection but not getting result as expected.

I do able to add the selected value to the collection using clearcollect but if i deselect any value i could not get the logic to update collection..  seems like this kind of request solution is tough for all 🙂 

[Fxddgvhhhg]

Thank you for showing your solution, it helped me, I have been trying to solve this for some time.