java.io.IOException: SNAPHU writer requires a wrapped phase band on snaphu export of subset product

I”m using SNAP 11. I followed the steps as displayed in the graph below

After the TOPSAR Deburst step, I used snaphu export and it exported the files without error. But whenever I subset the data before snaphu export, it fails with error as

java.io.IOException: SNAPHU writer requires a wrapped phase band

The screenshot of error and steps for creating subset and error during snaphu export are

The full error log is

java.io.IOException: SNAPHU writer requires a wrapped phase band
at org.jlinda.nest.dataio.SnaphuWriter.writeUnwrappedBandHeader(SnaphuWriter.java:105)
at org.jlinda.nest.dataio.SnaphuWriter.writeProductNodesImpl(SnaphuWriter.java:74)
at org.esa.snap.core.dataio.AbstractProductWriter.writeProductNodes(AbstractProductWriter.java:111)
at org.jlinda.nest.dataio.SnaphuExportOp.writeHeader(SnaphuExportOp.java:214)
at org.jlinda.nest.dataio.SnaphuExportOp.computeTile(SnaphuExportOp.java:194)
Caused: org.esa.snap.core.gpf.OperatorException: SNAPHU writer requires a wrapped phase band
at org.jlinda.nest.dataio.SnaphuExportOp.computeTile(SnaphuExportOp.java:206)
at org.esa.snap.core.gpf.internal.OperatorImage.computeRect(OperatorImage.java:82)
[catch] at javax.media.jai.SourcelessOpImage.computeTile(Unknown Source)
at com.sun.media.jai.util.SunTileScheduler.scheduleTile(Unknown Source)
at javax.media.jai.OpImage.getTile(Unknown Source)
at com.sun.media.jai.util.RequestJob.compute(Unknown Source)
at com.sun.media.jai.util.WorkerThread.run(Unknown Source)

Any help is appreciated.

@lveci, could you please take a look? Thank you!