Cannot get TIMED macro to work on Ipad

Hi, I am using Twine 2 and Sugarcube 2.

My story contains some audio, and everything works fine including playback of audio, but when I add the "Timed" macro, it never plays. The code is really simple:

<<timed 7s>><<audio "purplerain" play volume 1.0>><</timed>>

It works on my PC , but on Ipad/Iphone it does not work. I have tried Safari, Google Chrome and Firefox on the Ipad with the same result.

I am hosting all files on my website, not that I think that should have anything to do with it...

If it is well known that the timed macro doesn't work on IOS, does anyone know of a working replacement?

Best regards
Kenneth