Slider just hangs between slides…

Hi,
Ever since I began using Vantage theme I simply created new slide, added new slide to settings and the two images did what I wanted on the home page…nice. Then after coming back to the site it just hangs between slides. I can remove or deactivate and then reset it and it will work again, but then back to hanging when returning later. I had lots of other work to be doing and other sites so I didn’t let it concern me for a while there, but now months later I am back to this site and it is still just hanging unless I toggle stuff on and off. Yes I updated theme to latest. I certainly thank anyone who had this and has a solution…Cheers