Zephyros
Member
^It already happens from 5:01-5:04 in the left headphone, then again from 5:08-5:11, then very briefly at 5:25 as you described, but again very much noticeable and for a longer period from 5:30-5:42. At 5:42 you really hear the right headphone volume swell back to a normal level. There's more dropouts but those are the most noticeable parts as far as I can tell.
You probably noticed the 5:25 bit because it is short and abrupt, while the others are more gradual and spread over larger time periods.
The volume of the ride sways a lot all back and forth from 5:42 until it the break @5:56