There are at least 3 clock domains: COM_SPI_CLK, CLOCKLOW,CLOCKHIGH
Any needed synchronization is done in the firmware.
Just as a test, you might would try moving the COM_SPI GCLK pin
to another GCLK. To me this seems like it may cause a conflict
Worst case since you cannot move the 25 MHz clock, you could try
eliminating the fclk DCM (and run everything at 100 MHz)
