Resource room calendar not updating meeting times: Intermittent

I've encountered a situation where a user creates a meeting with a resource room attached. Sometimes, when she updates the meeting times and forwards the invitation to all users, their times update accordingly, but the meeting room calendar does not.

Although she receives the accepted time email from the meeting room email, the time does not actually update on the calendar.

When testing with her account on another meeting made the exact same way it worked without issue.

Deleting and recreating the meeting worked fine but she's mentioned this multiple times and it continues to be dismissed because upon testing it works as expected.