Hi neighbors! Thank you for sharing your images and video examples of these concerns. After viewing and bringing them to the attention of our teams here, it looks like these are bugs. Not a technical bug, but an actual insect.
When insects appear on a lens they will often look circular, lacking color and details. They will usually move in a unique or unpredictable pattern, rather than in a straight line. This might happen more often with the weather warming up in some areas, or in entry ways with lights.