Has something in FoundationModels guardrails changed recently?

I have an app on the App Store that takes user content and creates a Generable struct out of it.

In the last couple weeks I have started getting complains from my users that the part of the app leveraging FoundationModels isn't working properly.

In my testing I noticed that the same request that would've worked a couple weeks ago is now getting errors with guardrails violation.

I'm initializing my model this way

LanguageModelSession(model: SystemLanguageModel(guardrails: .permissiveContentTransformations))
// I'm aware that .permissiveContentTransformations does not apply to Generable, but I'd really really really really love it, if it did!.

This started around the iOS 26.5/macOS 26.5 releases and I wonder if there's a way to fix it.

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Has something in FoundationModels guardrails changed recently?
 
 
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