I’ve made some changes that nailed down the task of making this really work as I intended!
Check the doc here
First, I must thank BenLee, as he pointed out the column Current Entry and that was one of the keys.
The way the filter was being applied was not being sufficient to evaluate rows that had running column as true and that had the task index = to the indexes in Tasks table. I’ve changed the code and now it was being populated. This action was enabling the correct Stop button and disabling the correct Start button, as now this filter is working.
Second, I was having an issue with the button Stop now… it was not working anymore because the filter was also incorrect. A simple change to the filter in this button’s formula dealt with it and now evetything works as I intended at first!
Thank you all for the tips. I’ll leave it as it is now… haha