Now this is pretty, pretty odd.
Because since a long while, the $ input box is replaced with a dropdown, and since few versions, there is a refresh button next to it.
Your plugin version shows 1.5.2, but your site does not show these changes which were available since a long while ago.
This may be an indicator of a caching feature like opcache or a caching plugin caching your entire site.
If you have a caching plugin, please try disabling it and checking whether your plugin will show latest features in Patreon level metabox. This may be any caching plugin - WP Super Cache, Total Cache, or any opcache plugin.
This may also be due to your host’s opcache. In this case you will need to contact your host.
The basic idea is that your plugin is 1.5.2, but your site is loading old code somehow.