It seems that like in Schwabstrasse, the parking spaces were originally painted blue with yellow EV sign in the center, and at a later point re-painted completely yellow, but still as a blue zone.
The pictures from &Charge between April 2022 and January 2024 all show the yellow spots, but none of the picture show what the sign above says.
All the Chargemap pictures show the blue parking spaces and no vertical sign. They must have been published in July 2019.
The Google Street View images from August 2021 and June 2024 both show the yellow parking spaces. The sign above is the same design as in Schwabstrasse, saying EV, blue disc area, vignette 3012 valid.