sync invoke timeout (soa 12.2.1.3)

hello all

i have sca1/bpel and invoke sca2/bpel

invoke is sync

if no problem in sca2/bpel then sca1/bpel works correctly and no problem

next activities (after invoke) works.

if there is problem in sca2/bpel then sca1/bpel is stuck and next activities do not execute

tried to add scope (scope1) with onAlarm but onAlarm is also stuck and no next activities executes

any ideas ?

thanks