This section 20m before the finish line has apparently been dug up.
When they packed it back down, it bulged more. The wavy lines are not
an optical illusion, it is a noticible bump in the track. While they have
redone the inner lanes, it is uneven across the track. This is the classic
example of what not to do on a track. Build it right the first time. Put
in all conduits and sub-surfacing. Research the geology under your track,
before you build it.
There is a different surface on lanes 1-3 of that section and the painting
has been redone on the lines (poorly). Look at the curb height. The curb
is fairly consistent around the track, but the track waves up and down
all over the place. None of it is sufficient to be a legal curb, but it
goes from this section (above the curb in lane 2-3) to another spot 30m
down the track that is significantly below the curb height.