Hi , i have tried with XE6 IW14.0.44 CG 2.7.0.134 and XE10 IW14.0.49 CG 2.8.0.181 and i cannot reproduce the problem.
Are you sure that your software output is in a valid directory ? if wwwroot subdirectory doesn't exist mainly because js files are not present i have a never ending waiting circle like you describe.
i have a very big application, with more then 100 forms. everything works fine there unless i change Proportional:=True; once i change the Proportional:=False everything is fine again.
i also tried a new project, in a new folder(and synced everything). when Proportional:=True -->> endless circle Proportional:=False -->> everything is OK
if CG is absolutely sure that there is no bug, then it's really strange, right?
Can you send the test project , i'll check if it works my side . Have you checked in debug mode at client side if you have any warning or error executing js ? I was until last week using 14.0.46 version and didn't notice this problem , i don't think version of delphi is the key . Can you try with latest version of CG tools ?