hotspots just disapeared on the html5 version in the tourweaver 7.50 130621
Could you please send your project to email@example.com via www.wetransfer.com?
If the project is not very complicated, you may try to rename your scene with English letters or digits only and import it again to have a test.
I've tested, but notthing happing. I sendo to you my project.
Thanks for your attention