I can't see your pics either.
Any road up........probably the float in the sender gets stuck half way down.
The one in my Touring had been doing that, so I took it out. The bloody thing had all but fallen apart. The bottom screen had fallen off and this little assy keeps the guide post at the correct distance from the centre of the sender and thus allows the float to smoothly motor up and down. Without the screen assy, the guide post did not lie vertical and stopped the float as it lowered.
As a side note, when taking my sender out of the tank, the outer tube then fell off. There was not much holding it to the top of the sender, so, it appears the bottom screen assy does most for keeping it all together. Not, it would seem, the greatest design.