Weird graph problem for workout recently (Read 19 times)

I recently used garmin fr620 workout for training. After uploading the workout data, the graph did not show the complete workout data, as shown on the two workouts below,

https://www.runningahead.com/logs/1a7fee671c96470abe541aa0801af0dc/workouts/8d85773f758d4a86ab0b6792d3b15f72#graphs

https://www.runningahead.com/logs/1a7fee671c96470abe541aa0801af0dc/workouts/3c5c069f75fa4234978668d4dc69ffc2

Anyone has any suggestion how to fix the problem?