Some liveries require updates to work with the latest version of the A32NX.
Please make you check for any update of that livery, if it is not already up-to-date.
I suggest uninstalling Orbx WSSS and just testing if it makes any differences, some sceneries also need to be updated after sim updates.
Try to test vanilla… and see how it performs. If you run the sim without any add-ons for a longer time, are you still getting the hang and crash, maybe we can go from there.
Nobody wants to spend a lot of time troubleshooting but when the sim crashes and hangs you will need to be open to try different things to try to get it to work again.
This is one of the places for help, you also have the option to chat about the issue on Discord in the #communty-support area but please give some of the suggestions 
a try.