SD card issues with Swiss

[AndehX]

So I bought an SD card to use with Swiss as recommended here: https://www.gc-forever.com/wiki/index.p ... ility_List
I bought a Sandisk Extreme 64GB (last one on the list)
However I have noticed issues with this SD card (that were not present on my Class 4 16GB Sandisk)
When the main menu appears in F-Zero GX, the music has very heavy audio stutter - Not present using my older SD card.
Metroid Prime will randomly throw out "An error has occured" - Also never happened using my older SD card

Another thing I have noticed is that Swiss always seems to default back to 16mhz SD/IDE speed after power cycling my Gamecube, despite setting it to 32mhz previously...

Any idea what could be the problem?

[Guspaz]

Have you tried that new build of Swiss that has the new SD reading code from Extrems?

[AndehX]

I'm using the latest version, yes.

[Syntax]

Formatting with the same fat 32 cluster size?
GC games are 32k aligned.

[Extrems]

The cluster size is irrelevant.