Audio pitch inconsistent music playback
First found a thread on Android issue first and seems to be occurring there recently too (2/3 months ago). Also occurs on desktop version according to a user.
During playback there is an audible shift in pitch that is pretty easy to hear. I would elaborate more, but the thread itself addresses it much better that I ever will due to my lack of experience.
I am using app 3.3.10(440) on iPhone 8