eventHeight="auto" is implemented to work only with adaptiveSlotHeight=true, i.e. you cannot have auto-resizing events with adaptiveSlotHeight disabled. Consider the following example: https://www.screencast.com/t/lFpHDoBft
With eventHeight set to "auto" the event with long title "asdas..." has resized proportionally to fit the text of the title. As a result the slot has also resized to fit this event (and "Interview", which has the same date). If adaptiveSlotHeight were to remain disabled the slots would maintain their height. If that were the case how would the resized event fit within such a slot? Going back to the screenshot above imagine fitting the "asdas..." event within the height of the next slot where "test2" is. And what if you have 5 events like "asdas" on the same date? If the slot does not resize to fit them all there would be no point setting eventHeight to "auto".
I hope this explains the need for adaptiveSlotHeigh being enabled when eventHeight is set to "auto". If you want adaptiveSlotHeight disabled, then the options are:
1. not setting eventHeight explicitly. In this case it will use its default value (25).
2. setting a number to eventHeight, for example: eventHeight: 100
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