Hello all,
This has to do with an internal change in version M33.97 that changes the way jobs are looked up. There will be a fix for this in an upcoming patch.
To make your job chain work for the moment you can choose one of these two options:
1) make the reference to the job number mentioned in the job chain dialog, in your case 'job 3' 
2) change the job number (sequence number on the job chain call) in the xml tab of the job chain and reset it to 1
Regards Gerben