The World Allround Speed Skating Championships have been held since 1893. In the tournament, four distances are skated. Up to 1907, the World Champion was the skater who won at least three distances. If no participant won more than two distances, there was no world champion.
In those 15 years, it happened five times that the tournament had no winner, thus there was no world champion.
Are there more examples of major sports (let's say sports that have been Olympic) that had world championships that did not have winners? My personal focus is on the years 1893 to 1907, to provide context to the speed skating tournament, but examples from every time period are welcome.
(I don't mean championships were something unexpected happened, such as disqualifications or withdrawals, or outcomes that the organizers forgot to make rules for, such as participants being tied on points without tie-breakers. I mean championships where the rules were such that a not-so-extreme outcome could lead to having no world champion.)