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Leap, on the other hand, should never have such stability problems. It is so extensively tested, and so conservatively updated, that such problems are extremely unlikely to make it through. While the Leap distribution doesn't have that long of a history to look at (it's initial release was in April 2015), I think it is safe to say that Leap is related to SuSE Linux Enterprise in much the same way that Tumbleweed is tied to factory, and one thing that SuSE Linux Enterprise is very well known for is rock solid stability.
That's pretty much it, so I hope this brief review of the two distributions is helpful in deciding which would be right for your purposes.