Huawei P8 Lite 2017 Lock screen keeps changing?

[mrrupertzz]

I have recently bought a P8 Lite 2017 and they're brilliant. The only fault is that I have set my lock screen as a picture of my family and it will randomly change back to the default magazine ones in the gallery every other day or so. If anyone has had the same or has a solution it would be greatly appreciated. Thanks