Hey Josh,
I think it may be to do with how each site is configured. According to, https://make.www.ads-software.com/core/2020/07/15/controlling-plugin-and-theme-auto-updates-ui-in-wordpress-5-5/:
Note: Plugin and theme auto-updates are disabled by default. Administrators and site owners need to enable this feature to receive automatic plugin and theme updates. However, language packs for plugins and themes have always auto-updated when new updates are available. The new interface will not adjust language pack updates.
Otherwise, this may be a plugin or theme conflict. Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.
If you can install plugins, install and activate “Health Check”: https://www.ads-software.com/plugins/health-check/
It will add some additional feature under create a new menu position Tools > Site Health.
On its troubleshooting tab, you can Enable Troubleshooting Mode. This will disable all plugins, switch to a standard WordPress theme (if available), allow you to turn your plugins on and off and switch between themes, without affecting normal visitors to your site. This allows you to test for various compatibility issues.
There’s a more detailed description about how to use the Health Check plugin and its Troubleshooting Mode at https://make.www.ads-software.com/support/handbook/appendix/troubleshooting-using-the-health-check/
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This reply was modified 4 years, 2 months ago by Niall Madhoo.