The ViewedIt camera function reloads each time the tab you are recording is reloaded. The same also occurs during a full-screen recording when switching to a different tab.
The camera image element refreshes every time the tab you are recording is either reloaded or when you switch to a new tab. The camera circle in the bottom-left of the screen appears black or disappears completely until it reloads a few seconds later on the new page.
By design, the camera element is recreated every time a tab is reloaded or the screen switches to a new tab (during full-screen recordings).
This element is working as designed. This will not halt the audio or screen recording in any way. Simply continue your recording as the camera will reload itself automatically within a second or two.