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There are several steps you can take to address the issue of Content Security Policy (CSP) blocking more than you had anticipated:

1. Review your CSP policy: Check your CSP policy and ensure that it is set up correctly. Your CSP policy might be too restrictive or contain errors. Refer to the CSP documentation provided by your browser to ensure that you have configured your CSP policy correctly.

2. Enable logging: Enable logging for CSP violations so that you can see which resources are being blocked. This will help you identify any unintended consequences of your CSP policy.

3. Use report-only mode: Use CSP report-only mode to give you a better understanding of how your CSP policy is affecting your website. Report-only mode does not block any resources but instead sends a report of what would have been blocked.

4. Whitelist resources: Add URLs of trusted resources to your CSP policy to whitelist them. This means that they will not be blocked by your CSP policy.

5. Use nonce values: Use nonce values in your CSP policy to allow specific inline scripts to run. This will help prevent false positives where valid scripts are blocked by your CSP policy.

6. Work with your content and script suppliers: If you are working with third-party scripts or content providers, work with them to ensure that their resources comply with your CSP policy. Ask them to implement CSP headers in their response headers.

7. Test frequently: Test your website frequently to ensure that your CSP policy does not break any functionality on your website. This is especially important after making changes to your CSP policy.