All audio imported to UEFN plays at a 0.25 volume and creates artifacts on Left channel (OGG)

When importing audio into my project, I noticed that I have to set it to volume 3 to sound (almost) the same as the original. I usually import OGG format, like the one attached. You can test previewing this file then importing and previewing inside UEFN.

Also, the import process creates artifacts in the sound (on the left channel), which can be heard in this video while the voice actor is talking on playback 2 and 3.

Here is the spot that the artifacts are heard on the left channel, on loop: