The ARIA chat icon is using a z-index of 9999 to ensure that it's in front of everything while it's hovering. This makes sense, but the z-index is being inherited by the hidden div that contains the chat box as well. So, while the chat box is hidden, anything behind it is not clickable. This is affecting anything in the lower right hand portion of the page, which is either the scroll bar for the My Resources or for Suggested Solutions.
Release : 17.3
Component : SERVICE DESK MANAGER
This issue has been addressed in 17.3 RU2 rollup patch, and higher