Steps to reproduce:
Open TDP Automation
Create "Select to file" database activity and run it just to have a report that you can attach to the e-mail activity
Add nine "If_Condition" system activities in that same automation below the select to file
Add "E-mail" database activity
If you try to attach database activity reports in that e-mail activity TDP will open the attachment menu with no issues or extensive waiting period.
If you add one more If_Condition" system activity ( now you have a total of 10 ) and try to open the attached menu in the e-mail activity, the waiting period to open this menu will exponentially grow but after some time it will open the selected menu
If you add more than 10 "If_Condition" system activities and try to open the attached menu in e-mail activity TDP will be not responsive and crash every time.