I’ve encountered a very similar issue as you did, right after connecting an external current sensor.
At first, I thought the problem was caused by the sensor itself, since I hadn’t observed this behavior before. So I created a separate post about it. But later, after switching back to the internal current sensor, I realized that the issue still remained.
I tried removing all unnecessary Assistants — that didn’t help. Then I created a temporary workaround in Node-RED that triggers a VE.Bus reset, but it had its own drawbacks.
Eventually, after digging through the grid code settings, I found the parameter responsible for this behavior:
“Power rate 100% per 600 s”, and I temporarily resolved the issue by changing it to “Power rate 100% per 0 s”.
That seemed to fix the problem, but I’m concerned that changing this parameter may not be allowed officially by the grid operator.
So the question was raised whether this is possibly a firmware issue, since the standard describes this functionality a bit differently — and it may not be implemented exactly as expected.
More details here: Multiplus IIgx+external current sensor–delayed inverter response after AC restore until reset VE.BUS