Can be reproduced using this example: https://demo.mobiscroll.com/jquery/timeline/daily-weekly-monthly-yearly-timeline# Set timescale to 4-hours: <img width="1302" alt="image" src="https://user-images.githubusercontent.com/50309/192287398-d18a1a59-7e9b-41f8-9122-c388890828cf.png"> Set timescale to 12 hours: <img width="1302" alt="image" src="https://user-images.githubusercontent.com/50309/192287465-139ede54-5de5-49d7-b691-221cd0c3e1d2.png"> Now, set the timescale to 24 hours and then back to 12 hours. This 12-hour view is different than the previous : <img width="1302" alt="image" src="https://user-images.githubusercontent.com/50309/192287824-77c7eab2-bbb4-490f-a4e3-f152cfa8a1a2.png">