AD7945 Digital Glitch from WR_n line

I have an FPGA controlling a set of DAC chips, the AD7945, in a system updating at 1 MHz for time-varying ramps in the analog output. To mitigate digital impulse glitching, I have attempted to design the code to strobe the WR_n line out of phone with the main system clock, so that data is only latched when valid. However, by strobing WR_n, I see far more severe digital glitching on the output. Is there a subtlety to clocking the WR_n line that I am missing? The latency appears in the spec sheet to be well within the relevant timing that I'm attempting.

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