Phantom event blocking Scheduler availability

[Andrea87]

Hi there! 

I have just set up a one-on-one event that I will send to a group of students for them to make individual appointments with me via Zoom.

I've set everything up (configured my available times and synced it to my Outlook calendar) and it's all fine EXCEPT for one date.

When I look at my available appointments for this specific day (a Friday), my available times jump from 12pm to 5:30pm as if the Scheduler is seeing that I have a conflicting event on the synced Outlook calendar--except there isn't anything on my Outlook calendar. I've tried to remove this Friday from the available days and add it as a specific day with special availability. I've also double and triple checked my Outlook calendar to make sure there isn't an event I'm not seeing--I have nothing scheduled for that day. 

Am I missing something? Are there other parameters I can change to bypass this? 

Thanks in advance for your help!