Thanks for your help. I'll continue troubleshooting with what you suggested. 

I've already asked the developers about this issue. I'll update this topic once I get a response from them.

1. Deprecated feature used

1. 1. Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience

Otherwise, when I went to Debug Tab on the forum tools, there were no issues found. 

Please check for any console errors. You can do this by pressing F12 to open the developer tools, then, navigate to the console tab. 

Additionally, navigate to Dashboard > Forums > tools > Debug Tab > Sub Tab and check for any errors. If you find any, please let us know. Then go to wpForo > Tools > Database Tables Tab and click the button if you see any issues.

Is there any other way we can troubleshoot? 

Please register a new testing user and send the user's login details with your forum URL to infogvectors.com email address to allow us to debug the issue and provide a solution for you.

We have 2 forum boards with users having the ability to edit their subscriptions settings to each one through their profile. One of the boards is working just fine... the other won't allow users to unsubscribe. The subscription managers buttons to select are visible, but once "update subscriptions" is clicked, the page refreshes but the boxes are reselected. Users are having this issue, but so am I as an admin. 

One things I notice different for this board is the individual topics don't appear to select from (only the over arching subscription settings) could this be relative to the problem? 

The attached photos show the difference. The board "Engagement" is able to be deselected and all topics are visible; the second photo shoes the board "Roundtable" where you can see the selected boxes that won't save deselected and no topics are visible.