Safari IOS 13 beta 4 unwanted events fired on tap

Hi,

In safari IOS 12, when I click a item on a webpage, Safari fires up this list of events:

• touchstart
• touchend
• click

In safari IOS 13 beta 4 (but it does the same thing since the beta 1), when I click on an item, Safari fires up this list of events:

• touchstart
• touchend
  delay like 200 or 300ms
• mousedown (NEW, this creates a second click…)
• click

This seems like a broken behaviour.