Clicking Audio - Is it just me?

When I use the default script above for playing audio, when I the pause or continue, i get a clicking sound upon pause.

Is this a known issue, or is it my computer?

its a common issue, if you pause a wave-form and it suddenly goes to 0, or vice versa, un-pause and it goes from 0 to a large value… (rather than on a smooth curve) you can hear a click. ( square edge to a wave instead of smooth curve)
This is also caused by poorly cropped/edited sound files that are just chopped.
You can fix this by adding a short volume fade out and in, as part of the pause.