There seems to be a bug that wasn't there in a previous version. I am displaying tide chart info with your plugin.
Since each occurence, such as low tide, is treated as one event, its start and end time are the same.
With that said, the start time I have assigned to display within the span is no longer showing.
Instead, the span is empty or contains a no-breaking space.
To troubleshoot, I decided to offset the start and end times in order to see if that would fix the problem. It did, indeed, fixed the issue.
Here's my url you can inspect:
I purposely altered October 1st's start and end time to be different, so you can inspect for yourself.
Hopefully, there's a way to fix it.