Share link does not display the tune on first load

[estellecomment]

Seen :

• on Firefox or Safari or chrome, on macOS.
• On firefox on android.
• Probably on safari on iphone (not completely sure it's the same issue, but probably)

Reproduce :

• Wipe cookies and site data

• go to https://player.rhythms-of-resistance.org/#/compose/q1YqSCwpSS3KK1ayqlbyTUwuzUnNSQWxQ0rzwHQOUEZJUVUxQlcxQklHKRfMVVCM0ARzM0Bch9xibcUIA7BAEVCTUoSCAgiBKZBgcR5IUE8PhMAUkNADiuek5qWXZChZmdQCAQA/Maculele/Tune
  Expected : player is displayed in a dialog, shows shared tune
  Obtained : no player dialog. User does not see the tune.

• Fix : Click the link again. A new tab is opened, the player dialog does display and the tune is showed. (pasting the link again in the same tab also fixes)

Notes

• that refreshing the page does not fix (because the hash in the url, which contains the tune info, is removed after the first page load. So the tune info is lost)
• After the link has worked, pasting a different sharing link works correctly.
• bug happens whether it's a tune, a break, a whole song

Errors :

• On safari and chrome : no error displayed
• On Firefox, this error : An AudioContext was prevented from starting automatically. It must be created or resumed after a user gesture on the page.