The maximum cache size does not work as expected

[SSSEN]

Description
The maximum cache size does not work as expected. When the maximum cache size is set to 20GB or 50GB, the app will always use very little cache space or even no more than 5GB. No Limit The function is normal

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Expected Behavior

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Actual Behavior

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Steps to Reproduce

Environment

Device: iPhone
iOS version: 18.0
App version: 11.4