On further observation, the Inventory Items tab takes longer to load than the other tabs, and not only the Qty owned column, but all the columns do not respond when clicked
Unfortunately @Satjeevan, I couldn’t reproduce your bug. I haven’t tried on Linux Mint though.
I can’t place it in bugs just yet since there’s no traceback so I’m not sure whether it has something to do with your Linux distro, you will either have to do some further testing or see if other users face the same issue.
Did you first update Mint as well, if so how and what is the version you use. If you system has an Nvidia graphics card this is often a case of drivers and not an issue caused by Manager. Out of the box Ubuntu works as expected, so has to do with you Mint Linux distro and the related browser also!