Why GitKraken graph is not showing commits of same branch in chronological order?

I asked GitKraken support about this a while ago. Their response:

The graph behavior you noted below is a known issue that is currently with our team for review. GitKraken only looks at the commit timestamp when drawing the graph, so when those commits are not in chronological order, the result is the orphaned commit seemingly on a separate branch. I'll give that existing item a +1 to note your additional interest in a fix for that issue.