Hey!
I have this issue with Safari on my iPhone. This issue only started happening when I upgraded to 8.3 and kept my backup.
When I open Safari, it works fine, it loads the last page I visited without an issue but if I click on a link or try to visit a new page by entering the URL, it freezes for ~10 seconds or more! I cannot click anything or do anything in Safari as it's unresponsive. After the freezing is done, Safari works perfectly fine. No more hanging or freezing anymore. This only happens once at the launch of Safari then it works well afterwards.
I restored my iPhone today and I tested Safari without restoring from backup. It worked fine. No lags or freezes or anything. So the issue must be with my backup?
What do you guys think? Any suggestions?