I guess it could be either? Like either a large bolus or a total amount of insulin at one site?
Since you mentioned limiting it to 5 units at a time, maybe 150 units or some other number of total units makes a difference? I don’t really know.
I’ve only had a few and it was because of the pod being in a place that got jostled around and caused it to come out.
I do think pressing it down on the skin when you activate it (until you hear the insertion “click”) helps.