Adding an item to a repeating fieldset and then using <tabulator> to apply the change to one of the fields messes somehow with the interface. Working behaviour Click Add Enter a value Click somewhere with the mouse, such that the focus is lost, the added item is saved Repeat 1 to 3 Expected behaviour Click Add Enter a value Use <tabulator> such that the focus is lost, the added item is saved. The next field has the focus now. Repeat 1 to 3 Here comes the "bug": The second workflow does not work because the second time you click on "Add" the new row pops up and immediatly vanishes. As you have "clicked" somewhere else you can continue with the working behaviour, but this means you will have to click on "add" twice. This is super annoying and forces the user to click somewhere else to "really" continue or click twice on "Add". Of course it is not a big problem, as you can still enter stuff and nothing will break but it drives me crazy when I enter a lot of values :) I am pretty sure this topic came up a long time ago and some dev already answered to this. However, this would really be one of those quality of live improvements :) Edit: It does not seem to happen with all repeating fields, therefore I expect this to be a fault of mine and not of roll20. Please close this thread.