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If you inline load images without using a relative path you will get mixed content which makes your page insecure. Tools to check this,
- https://www.jitbit.com/sslcheck/
- https://developers.google.com/web/tools/lighthouse/audits/mixed-content
- https://www.whynopadlock.com/check.php
And here's an example page of common mixed content errors.
Clean Up
Some CSR requests may be re-used to renew the Signed SSL Certificate. However, often most CA's will by process ask for a new CSR even if the original may be reused.
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