Eye and Hand vis are being created even without data

[soniacq]

Describe the error:
I created a recording without using the Hololens (I simply replayed a video). For this recording, we shouldn't have any visualization for eye or hand data since we did not use the Hololens (only Hololenses produce this kind of data). However, a visualization was created for the eye and a JSON file is being displayed for hand data. This obviously is an error because we do not have data for them. Are we reading something from cache or similar?

To reproduce:
Select the recording called 2022.09.30-14.26.24. Recording an empty video.
Select the recording called 2022.09.30-14.36.41. Recording a pinwheel video.

Expected behavior:
A message saying that there is no data available should be displayed.