Same problem with my Samsung Galaxy S10. it's 7 days old. Updating OS, Camera App and set the phone back to factory settings did not fix the problem. So this has to be an hardware issue. The Tele-Lens only detects really close objects: You place your hand infront of the back camera, the 2,0x Lens sets the focus, you remove your hand from the view-angle, the camera set's the focus to the far away object for 1-2 seconds and then the image gets blurry. (in Normal foto mode and video). The front camera has the same problems at all camera modes.
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