OData $batch request from WebIDE fails

Hi experts,

I'm having below issue.

OData service has been set up in Gateway server and tested.

A Fiori worklist application has been created in WebIDE using above OData service.

When executing this app, $batch call fails. (It is trying to fetch $count and top 20 records from an EntitySet)

batch.png

I added below entry to manifest.json to prohibit $batch call and this worked.

"settings": { "useBatch": false }

manifest.png

So it seems that the Gateway is not accepting $batch request.

$batch had worked before and today suddennly this issue started to pop up.

Does anyone have idea how to solve this?