CAM-B1P Playback

I’ve recently noticed a problem with playback. It’s not possible to move the slider within the blue area. No matter how much I move the slider, it always jumps back to the last half hour of the recording. This concerns playback of a local recording from the card. Events are recorded normally in the cloud. Has anyone had a similar problem and how was it resolved?

Can I only view the most recent event on this camera? I don’t have a subscription, I’m just watching from an SD card.