Dive Log widget shows blank data after deleting short dive

On Sunday I recorded a Single-Gas dive activity, which worked fine. While swimming back to the beach after ending that dive, we dropped down to about 5 ft for 2 minutes to get under some kelp so the device recorded a second short dive. I didn't want to count that second dive so I manually deleted that activity on the device before it ever synced to Garmin Connect / Garmin Dive. But now when I look at the Dive Log widget glance it shows "--:--" and doesn't display the time for my real dive.

When I press the Start button on the Dive Log widget it still shows the "--:--" invalid dive time. But weirdly it does show the correct Min. Temp. So maybe some part of that second dive wasn't fully deleted?

When I press the Start button a second time it does show a correct summary for the real dive.

So it's not a serious defect, but this is a bit annoying. Is anyone else seeing the same problem? Perhaps I should have turned on Pool Mode before swimming under the kelp.