That (also) depends on the shape of your default figures. Glyphs needs to do some heuristics (measurements) to find out what kind of figures you have in the unsuffixed defaults, unless it is clear from the suffixes what kind the default figures are.
I see that next to the defaults, you have all four .tf, .tosf, .lf and .osf suffixes. Is one of them the same as the unsuffixed default? If so, delete it and update the features.
Great. In this specific case the default figures are «uppercase», so I have some doubt, why they stop working? I suppose tabular figures should not stop working. I will review again. Thanks for the help @mekkablue