Timeline end dates showing incorrectly
I'm using the Timeline in my Wordpress site and everything is displaying correctly, other than the fact that each entry seems to be restricted to exactly 30 years on the timeline. This is regardless of what I've entered for the dates and whether I use just years or include day and month. The start dates are all correct, the end date is just being ignored.
Wordpress 5.2.2 with HP5 plugin version 1.13.1 and happens on all devices.
I'm using Chrome to work on the site https://www.plainsightsound.com/timeline/
This is the first timeline I've built using the plugin so I can't say if I've noticed it being caused by any updates etc.
Hope you can help!