Is the sequence in the WTG (Waiting for Trigger) state?
To change the setting using a trigger, set the trigger source to BUS and send the INIT command to set the sequence in the WTG state.
If a trigger is sent in the WTG state, setting changes.
Are you communicating via LAN using the HiSLIP or SCPI-RAW protocol?
Using the HiSLIP or SCPI-RAW protocol may slow down the panel display updating. Even if this is the case, communication is operating normally.
If the delay is a concern, wait about 1 ms before sending the next command.