HTML5 Level Not Loading (4.8)

Hi, I’ve recently run into a major problem with my UE4 project, I’ve been working on streamlining it too work on HTML5, and its been a 99% success. For some reason levels do not load when they should. Now I’ve been working through logs for last few days and can see problematic snippet…

[2015.06.18-22.37.23:602][163]LogPackageName: SearchForPackageOnDisk took 0.395s to resolve Stage_1.umap
[2015.06.18-22.37.24:017][163]LogPackageName: SearchForPackageOnDisk took 0.401s to resolve Stage_1.umap
[2015.06.18-22.37.24:027][163]LogNet: Browse: /Game/Game/Maps/Start_Screen
L
[2015.06.18-22.37.24:046][163]LogNet:Warning: Travel Failure: [InvalidURL]: Invalid URL: /Game/Game/Maps/Start_Screen
[2015.06.18-22.37.24:061][163]LogNet: TravelFailure: InvalidURL, Reason for Failure: ‘Invalid URL: /Game/Game/Maps/Start_Screen’
L
[2015.06.18-22.37.24:077][163]LogNet:Warning: Travel Failure: [ClientTravelFailure]: Invalid URL: /Game/Game/Maps/Start_Screen
[2015.06.18-22.37.24:083][163]LogNet: TravelFailure: ClientTravelFailure, Reason for Failure: ‘Invalid URL: /Game/Game/Maps/Start_Screen’
[2015.06.18-22.37.24:101][164]LogNet: Browse: /Game/Game/Maps/Start_Screen?closed
[2015.06.18-22.37.24:109][164]LogNet: Failed; returning to Entry
[2015.06.18-22.37.24:117][164]LogLoad: LoadMap: /Game/Game/Maps/Start_Screen?closed

For some reason it finds correct next level in package but then reverts back to loading current level anyway, causing invalid URL errors.

Now ive actually tried to check if it is me or editor and upon creating a blank project and trying to load a level in html5 same thing happens (which got me thinking its a bug and possibly not me)
Any idea on this anyone? (oh ive been through all standard bug checking stuff, all path names are correct etc0

Duplicate of HTML5 Build Levels Not Loading (4.8) - Platform & Builds - Epic Developer Community Forums