Fan Speed ramps down to idle

[draughted]

I've been testing my vega 56 with good success in phoenix miner. and have found that I don't get much luck with the fan settings... They are always coming unstuck from the fan setting tab (always resetting to the speed of the actual fan when ever they feel like it). I can as it happens, I can set the timings, have the fan settings come unstuck when I click the update button, and reset the fan speeds with a second update, only for the fan to slowly ramp down to idle, dragging down the hash rate with it...

I am hoping it is a symptom of a simple setting I can adjust, but other than that, I am spent, Need Help....