Huawei P10 Lite notifications do not appear completely on lock screen?

The title actually says almost everything. I've had this cell phone for about a year now, everything was still normal, ie. If I 2 or get a long WhatsApp message, I could swipe down on the lock screen and both or the whole message can be displayed. For a long time, however, I always have to unlock my phone to see the message. So I can't press down on the little arrow to read the complete message. Is there a solution for this? (By the way, every app is not just a WhatsApp)

That's the new whatsapp, and everyone's like that.

But that's not only the case with WhatsApp but with every app

Then you have something wrong.

Yes and my question is how to put it back

Save data Factory setting.