Hi, I have a fullcalendar scheduler working fine on the same version of Servoy as you, however looking at it closer it is not Servoy’s calendar component, it is the nphscalendar by http://www.nephos.co.uk.
I would
check the config you use to generate the calendar, taking out bits at a time to try to isolate the issue.
do the same with your css, commenting out sections to see if the problem disappears.
check any containing objects on your form to see if you can disable unwanted scrollbars.