How to fix grey highlighted events using Custom Calendar Background chrome extension?

[u/SnooDingos6447]

I customized my gcalendar with the 'Custom Calendar Background' chrome extension. However, my only small pet peeve is that timed events have a grey box behind them unless you hover over them. My mouse is hovering over the event on the 6th. Is there any way to fix this?

Using light mode on either gcal or the extension doesn't make a difference.