Hi,
I see the same pike in the same conditions as seen in your screenshot.
But, only with VBW less or equal 300Hz (and RBW leass or equal 3Khz, not tested each case).
On any trace, go to trace menu, push View, then Clear write and the pike is there.
With 100Hz VWB, you can see a little pike before making the trace view/clear write operation.