J1m It just makes no sense.
We successfully set your discharge schedule times and enable discharge mode, and based on SoC and discharge rate estimated your SoC to be reached at 22:45. We therefore issued the following set settings commands (as we do with other Giv inverters to stop export):
Set Enable DC Discharge=0 (setting 56)
Set Enable Eco mode=1 (setting 24)
Set Battery Reserve limit=4 (setting 71)
Those all succeeded. It would be good to pass these details on to Giv and ask what settings they think should be set to stop the export and stop drawing from the grid for your inverter.
Especially given that this works correctly for other Giv inverters, we're a bit at a loss.
We don't touch the AC Enable=false when starting the export, and therefore don't set AC Enable=true back at the end, we basically don't set it.
That's the only differences I can see between our commands and the commands from your log set via the Giv app.
But this does look like some inverter issue? You said it worked a day ago without problem? And from our logs we can't see any failed commands. And nothing has changed in terms of instructions we send to end the export.