I hear the anomaly at 1:38 - it is quite obvious on headphones. There is also a less obvious anomaly at 2:10.
There are less obvious sound discontinuities at the same places in his version with Ariana Grande:https://www.youtube.com/watch?v=7uJ4kJiMUAc
I also vote for a poor edit.
I have done splices on my Korg D3200, and done them better, even though I am just an amateur doing mixes of my covers band.
There is a small chance that these audio glitches are intentionally there for the youtube versions, to lessen the value of any audio copies that might be ripped from these. But because of the placement of these glitches, I am still thinking bad edit.