I’ve been on Humalog many years. This has never happened to me. Let us know if you find out what it is. It would certainly concern me.
so it’s happened on more than one bottle? were they perhaps in the same shipment (if you mail order). I was just reading this topic from @Brian_BSC and I’m wondering if maybe yours got frozen somewhere along the way
and welcome to TuDiabetes @Jess1220!