This is due to the scanners.
Newer scanners don’t need electronics out, older ones do.
Unfortunately, they don’t replace them ALL at an airport at the same time, leading to inconsistency…
My current major airport I fly through doesn’t open pre check until 9am, which is a pain, cause I have to print a paper ticket to get my precheck privileges in the normal lines
Which causes chaos cause I don’t have to do things others do
This is essentially what banks do.
Most of the employees are VPs