If you change the OGP image after it is published, it will not be reflected immediately on the SNS. This is because each SNS has its own connection to this URL like "This URL has this OGP image".

If the SNS cache is updated, the changes will be reflected, but the timing is not something STUDIO can be involved in, so please wait for the updates. The update interval is also various for each SNS.

You can see how it looks like when you share from these links:
Facebook : https://developers.facebook.com/tools/debug/
Twitter : https://cards-dev.twitter.com/validator