Yes, I can confirm this, however I am not sure it is a WebOS issue.
It started this first by asking me to sign in every time I launched it, instead of asking me to select a user profile. I had to exit the app completely and when I next launched it, I was asked to select a user profile.
Then yesterday it started showing the splash screen and just sitting there indefinitely. It became a case of launching another app like iView, closing it and then Kayo seemed to be OK until the nest launch.
I say not necessarily a WebOS issue because I also have an Android TV Box, and Kayo started doing the same thing using it.