Hey Peter!
Thanks for using our plugins!
The larger text is a style from your theme. Occasionally the calendar styles load after the theme styles and occasionally there is enough of a delay (slow load or slow connection) that you get that flash of “unstyled” text. I noticed it doesn’t happen (for me) after the first page load, as the styling is then cached by the browser.
Let’s see if we can fix it!
In Appearance -> Customizer in the dashboard, you can use the Additional Styles section to add this style:
h3.tribe-events-month-event-title {
font-size: 100%;
}
That should fix it. If not, let me know and I’ve got another approach.
Cheers,
Stephen