Sync issues on Safari

[sathomas]

I really hate to create such an unhelpful issue, but at least as a recording of the problem, I see intermittent issues with Safari (latest) on macOS in which clusterize gets out of sync and the table isn't fully rendered. Here's an example screen capture from the demo page

That's not a transient issue, the table won't update any further unless the user scroll again.

Maybe this is a recurrence of #3 ?

Unfortunately, I can't reliably reproduce this problem :(