I noticed a rather strange bug today. I created a repeating group, which expands by window size and adds elements to it. Everything worked as usual, but after I put this repeating group into a group (for design reasons) nothing happened anymore. The group and the repeating group is extended, but no new elements are added.
Enclosed are the two variants:
Once in a group and once without a group. The repeating groups have the same setting, only that one is in a group.