ZenFone with memory issues?

I have this Asus ZenFone Live L1 ZA550KL (ASUS_X00RD) that behaves in a way I've never seen before with other Android smartphones I've used.

I owned a Samsung Galaxy S3, a Motorola G4 and even an Asus ZenFone 2 in the past. All entry to intermediate level gadgets. This ASUS_X00RD seems to have...

ZenFone with memory issues?