I’m sorry you’re still having this issue and that other people are too.
It’s definitely worth upgrading to Android 8
Unfortunately, by phone standards the Huawei Mate 7 (MT7 LT10) is already outdated (I know mobile technology moves so fast being an iPhone 4 user myself until recently!), so short of lowering the graphics settings as much as possible, updating your OS and also trying to force close the app and restart it to see if it makes a difference, there’s not much else you can do as the crashing is caused by a memory management issue on the device itself.
@Papa regarding the Motorola G5 Plus I’m going to ask the team about that as it’s a new model.