I'm not sure if this is a system or launcher bug.
Mekede DUDU7 13in running DUDU OS v3.6 (this problem also happened with previous versions).
I use "TomTom GO" navigation in PIP, and having been doing so for about 6 months.
About 50% of the time after DUDU power-on, the TomTom app comes up with it's splash screen and "Loading app", and sits there doing nothing. The other 50% of the time, it works just fine.
It is not related to having internet access or not (no SIM card, so mostly off-line).
I can't find a cause for it.
If i go into the TomTom app information and force-kill the app, sometimes it'll start working, other times it wont and have the same problem. Ive tried clearing the app's data, cache, etc, it makes no difference.
The TomTom app is updated frequently, and I use it on other Android devices with no problems at all.