Did Grande lash change the formula (about a year or so ago) or has anyone gotten contact dermatitis from it??

I know this is long but PLEASE I need help so badly — over a year long issue I can’t seem to figure out

I started using grande lash about 3-4 years ago. The first couple years were great, my lashes were SO long and full they looked like extensions, and I had no negative side effects. After that, I remember having a 6-12 month long period of not using it because I was too lazy to repurchase tbh. I finally got it again and was so excited to get my long lashes back, but things were never the same

After using it again for a while, I didn’t have any negative side effects, but my lashes weren’t even close to as long/full as they were that first go around

Eventually, I noticed having lots of missing chunks of lashes, constant styes (but like rly tiny ones that would go away on their own after a couple days), and many lashes growing above my normal lash line but they weren’t normal lashes. Idk what the actual name for these are but I just call them “dead lashes” lol, referring to the ones that bend in weird ways or just fall horizontally, then come out super easily if u touch them. So I started having a ton of these shedding, along with normal ones too - more shedding than the usual lash cycle

Anyways, I’ve been experiencing the WORST eye dermatitis for about a year now. Huge red circles on eyelids and under eye (like raccoon eyes, not just right by the lash line), itchiness, flare ups of MAJOR puffiness (a couple times my eyes looked almost shut) and the more minor times look similar to a hive, then once the puffing goes down it dries up, crusts and flakes like crazy. It goes back to normal for a bit then a flare up happens again

I switch to a basic routine during flare ups, which includes stopping the lash serum. Then once I’m stable for a while again I re-introduce it. Idk why I never considered the possibility that the serum could be potentially causing this - probably cause I’ve used for so long without reaction, it’s taken me a while to turn my head to it. I’m just starting to wonder if this is the cause. It’s 100% contact dermatitis, I’ve gotten it on my hands and neck as well though so idk. I can’t keep living like this, constant pain and itching, worried about every little thing I put on my face, always catering to it - I’m exhausted

Did they change their formula sometime within the past few years? Or has anyone had a similar experience/know more about how contact dermatitis works?? Can u develop it even towards something u have been using for so long? Literally any advice would be so helpful