When I add anything to the custom css styling section, even just a blank comment, the monthly calendar view gets buggy. Would love some help on this! I've added pictures below to show the issue.
The calendar before I've added any CSS (i.e. how I would like it to stay):
The calendar after adding any CSS:
This is the only text in the custom css styling section that caused the change in the calendar (and adding any other styling results in the same calendar bug):