Sorry, but can you tell us if for you this situation is normal according that this bug has been mainly reported the 3 April, so around 15 days before the official release.
It’s like the PlayerFrefs not working on WebGL, this bug has been reported the 26 March :https://issuetracker.unity3d.com/issues/playerprefs-dont-get-saved-in-a-webgl-build and the status is “Fixed in Unity 2019.2” so for July right?
So now, imagine someone new coming for making a small 2D game with WebGL and sprite with the last Unity version.
He can’t !!! Because the playerprefs is broken with WebGL, the UI (sprite) is broken when you access to it by script and you can’t edit your script if you have too much input value in it. ( https://discussions.unity.com/t/740412 )
Anyway, you have all informations here : https://discussions.unity.com/t/741630
Thank you.