Just wanted to find out if anyone else feels like the test from 19/08 (on the right) is faulty?

I took that one this morning, first urine of the day and it was extremely light (lighter than the one I took 2 days ago, which I thought just meant negative and I'm seeing things).. But when I looked less than 12 hours later at the test, almost all the lines on the test have disappeared or are fading like the control line but the test from 2 days ago is still dark and very clear.

I know I can't trust the results after the timeframe, but surely it fading so quickly on one and not the other means something is wrong?

Just for record, the tests are meant to have a line between the 1 and 2 which falls under the cover but is very pink when taking the test at first (as you see on the one from 17/08) but the line has disappeared completely on the right one.