I’m sorry for the Clickbait Title but this is my Problem.
I took a Kontalk sabbatical till now because with 3.1.x i had the problem that now and then Messages were nor deliverd (I used SMS in the meantimes because i don’t like the alternatives to Kontalk). Just now i have that problem again (I’m on Kontalk again sine 03.01.2016). i sent a message at 07.48 that was never delivered. i sent another one at 11:28 and 11:29 and they were delivered instantly. My Contact always show as “Online” when I’m sending.
I use the Kontalk Version. Is the google Play Version with Push Notifications more reliable?
I had the problem with a Huawei G510 with Stock Android 4.1, a Samsung Galaxy S4Mini with CM12.1 and now with Moto G2 (LTE and Dual SiM) with CM12.1, CM13 and CM14.1).
Greetings from Germany!