Slide Effect in Firefox and Safari Browser

[JKDE]

Hi, i have some troubles with the 'slide' effect in Firefox and Safari Browsers. Chrome is working fine.
Problem: Notify is shown for a millisecond and then disappears.
On the Demo page as well. Sometimes the first notification is working fine, but the second disappears quickly. 'fade' effect has no problems.
Setting:

new Notify ({
    status: 'success',
    title: 'Notify Title',
    text: 'Notify text lorem ipsum',
    effect: 'slide',
    speed: 300,
    customClass: '',
    customIcon: '',
    showIcon: true,
    showCloseButton: true,
    autoclose: false,
    autotimeout: 3000,
    gap: 20,
    distance: 20,
    type: 1,
    position: 'right top'
  })

https://simple-notify.github.io/simple-notify/

[chrismaaz]

Same thing here, it slides in and out instantaneously. The same effect also happens in Safari in iOS.

Also in Safari, it doesn't display the SVG icons. Any chance for a fix?