A customer reported us that a Grouped Gain often couldn't be controlled via serial command and we could reproduce that with attached design on CSD5.4. This issue occurred when a ParameterSet including the Grouped Gain was invoked. The procedure for reproducing as follows:
1. upload the design (Group 1 has a Gain "MASTER", ParamSet 1 has Group 1)
2. recall ParamSet 1
3. send "SN 1,M" and we can see the gain stays unmute condition on CSD
We asked the customer to use serial commands for Gain blocks instead of Grouped Gain control.