I think it's a cache problem. Sometime the form run fine and sometime it doesn't. Same value typed in the same element will stuck the ajax option and after i press Ctrl+F5 for several times, it will run fine..
Rob, you can test it in my website,i use the default template with no javascript/validation applied to this element (the list is available only for Super Users, in section "My Site" you will find the login data). See here , maybe you can understand what happen. Select any value from dropwdown and type any letter in cdd and pick a value. In my case, the first test do run fine, then something happen and ajax is stuck. Using Ctrl+F5 will solve the problem for few more tries then is stuck again.
Rob, you can test it in my website,i use the default template with no javascript/validation applied to this element (the list is available only for Super Users, in section "My Site" you will find the login data). See here , maybe you can understand what happen. Select any value from dropwdown and type any letter in cdd and pick a value. In my case, the first test do run fine, then something happen and ajax is stuck. Using Ctrl+F5 will solve the problem for few more tries then is stuck again.