xxx Sure i don't mind, the app i talk about is Deezer. I feel like my english abilities are lacking to explain what i meant as it still seems unclear.
The app works without google play. The app was initially installed after google play service was installed.
After seeing here whatsapp can deliver notifications without google play, before actually deleting google play services suite, i went to system > apps > google play services and disabled it (framework and play store aswell).
I did this to see first for a while if there is weird behavior from other apps that i wasn't aware of.
I saw like i mentioned brave slow 5sec before loading a page, Deezer staying on splash screen and whatsapp no notifications (which i knew already).
Then i deleted whatsapp and deezer, rebooted the phone, checked if play services suite is still disabled. I know apps will perform their initial check on install if play services is available on the device. I reinstalled whatsapp and deezer. Deezer kept behaving as before uninstall while google play services are disabled, resting on the splash screen. I cleared cache and all app data, uninstalled, rebooted, tried reinstall again and same behavior. So i though weird, maybe the app won't work without google play services. I've tried installing Deezer in a profile without ever google play services installed and it worked.
So i came to the, for me, interesting observation that apps on initial check for google play services on install for some reason still can find component(s) from google play services while disabled, and probably tried communicating with it but unable to because disabled. I wanted to share that observation here, as for me it was interesting.