You mentioned quality being low but not the strength... typically that close you really need to watch that you aren't over powering the device. I also strongly recommend one use an appropruate LTE filter as too often those signals overload the internal amplifier. Here's an example of what I'm seein...

HDHR5-2US, running the most recent firmware (20231214), sitting about 12 miles away from the major broadcast towers. I've gone through 4 antennas now and I'm having difficulty getting it to lock on to anything. The antennas in question: Radio shack generic passive (indoor) - 0 GE 34134 50 mile activ...