sharing a post on LinkedIn shows no preview

Hi, found out recently that when trying to share a post on LinkedIn, no preview is appearing. After searching around a few different websites I have created, same thing was occurring. Common thing was, all sites are using Acunetix WP Security.

If I disable the plugin, then the preview on LinkedIn started working as expected.

If I r-enabled the plugin, but cleared all of the check boxes under WP Security > Settings, then the preview on LinkedIn would work as expected.

I’ve tried fiddling with a few of the check boxes under settings (such as leaving the ones related to meta tags un-checked) but haven’t yet worked out which combo causes the issue. Is this something you guys might already know about?

Typically I have everything under WP Security > Settings checked, except for “Show the RSS” and “Enable Live Traffic Tool” (ie. the last two options are un-checked. All others I check by default).

https://wordpress.org/plugins/wp-security-scan/