IUPredWS service customAnalize method fails for multiple sequences of different lengths with 'not aligned' error

Submitting a job of more than one sequence to the IUPredWS service with a custom parameter (e.g. "long") results in an exception if the sequences are of different lengths.

Error from Jalview/JABAWS2.0 client:

submission error with Submitting amino acid sequences for disorder prediction. :
compbio.metadata.JobSubmissionException: All sequences must be of the same length. Please align the sequences prior to submission! The first sequence length is : 97 but the sequence 'Sequence2' length is 144
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createUserDefinedException(SOAPFaultBuilder.java:294)
at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:124)
at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:108)
at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78)
at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:107)
at $Proxy26.customAnalize(Unknown Source)
at jalview.ws.jws2.JabawsAlignCalcWorker.run(JabawsAlignCalcWorker.java:153)
at java.lang.Thread.run(Thread.java:680)