Zend certified PHP/Magento developer

Special Price Updating unknowingly – Magento 2

We have an issue with the product’s special price on our website. Special Price is updating for a few products unknowingly. we are not adding them manually and we suspect that it is happening with an API request.

I have verified the Magento and servers access.log but didn’t find any requests of sale price update.

Could you please let me know the ways to debug?
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Note: Website is in Adobe commerce cloud.