Hi JRenklint,
Always 4 times faster... that's weird isn't it, looks like a setting to me. Did you had a closer look into the Logic Pro already? Perhaps somewhere multiplied the clock before sending it out on MIDI? It also could be a setting in the Erica Synths - Black MIDI to CV module but that one you should be able to find in the manual.
For the moment as a work around (till you found the problem) you could use a modular divider and divide the clock by 4 then you are back to the original clock signal :-)
Good luck with the troubleshooting and kind regards, Garfield Modular.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads