GPT 4.1 Degradation over the past 30 days

Anyone come up with a solution?
I had a long prompt that used to work perfectly, now it just forgets things all the time, and i need to come up with additional developer messages to put in the end.
the best way to solve it is to put the developer message in the end and not in the beginning, but that disables the prompt caching and costs A LOT.

this is a horrible degredation.
Can we somehow get the original 4.1 back??
@OpenAI_Support @lylevida

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