Sorry for taking a bit to respond. I think the issue here is you’re not using a dynamic ID or a dynamic z-index. So rather than use rtg3 as the id in both your HTML element and your target element (and no, you don’t and probably shouldn’t add this same id to your repeating group), you need to add a dynamic part after like: “rtg3current cell’s unique id”. You can and should add dynamic data both in the ID field on the target element itself, and insde your HTML element. Why dynamic? So that you can target everything individually, and not just have e.g. the html on cell 1 target every single element the same of your repeating group which won’t work since if you’re making a z-index of 2, every single thing will be on 2 and you want levels instead.
So just add “current cell’s text’s unique id” (every element on bubble has an unique id) inside your IDs and it should work, since each thing inside your repeating group has a different unique id which bubble does automatically every time you create a thing (not sure how much you know).
Second, you also have to make the z-index dynamic. So instead of 1, change it to either “current cell’s index” (this gives you the number cell this is), if you want latest objects added to come up on top (e.g. cell 1 comes below a thing from cell 20). Or, change it to “current cell’s place” if you want to add a field to your element of type number that you can change from your database yourself (like in the event you wanted to let the element be brought back and forth)/make changes to current cell’s thing +1 or -1 to bring things front and back. So if you made a change to your thing in cell #2 for its place to be 5, then it’d come up on top of every thing in the repeating group whose place is under 5.
In other words; make your id dynamic and make your z-index dynamic. 