This is a very strange issue! I have actually never seen this specific issue before. The fact that it is also impacting your ability to send SMS on your phone has me quite concerned. Can you please tell me what version of Windows and what version of Mac OS you are using? Also, what is the SW version of your GS8.
Hiya, skeechan99! Just wanted to check in with you here regarding these message threads bogging down your SMS world. We'd love a few more details about your setup if you're still having trouble! Thank you.
Just checking in here to see how things are going. Let us know if you still need help.