@Steven_Smith @Jason_Green1 A possible workaround:
- Create a single select “action” field for triggering one or more rules
- Set the rule trigger to marking the action
- Add a rule action to clear the action field.
This will be able to run on multiple tasks as you can set custom fields for multiple tasks.
It can even run on entire projects but slower when selecting >50 tasks.
Credits to @Tiffany_Fung and @Richard_Sather for teaching me this.