<audio> source paths break, depending on whether URL ends in an /

[Nekkowe]

These two links point to the same page:

1. https://nekkowe.com/blog/posts/guilty-gear-strive-umineko-sound-mods/#1-umineko-clash-wall-break
2. https://nekkowe.com/blog/posts/guilty-gear-strive-umineko-sound-mods#1-umineko-clash-wall-break

However, the audio players only work for the first one:

But not the second (note the 0:00 length):

It appears that with the first link, the tag gets assigned the proper URL for the sound file:
https://nekkowe.com/blog/posts/guilty-gear-strive-umineko-sound-mods/SE_BTL_CMN_Wall_BoxJump.ogg
but with the second link, the tag instead winds up with this broken URL that assumes the file is located one directory higher:
https://nekkowe.com/blog/posts/SE_BTL_CMN_Wall_BoxJump.ogg

I'm not sure what's going on here. Ideally, the src URLs of <audio> tags etc. should probably become absolute URLs in the final HTML, as URLs for <img> tags already do.