The "Post Build Comment" settings are ignored for some jobs. Instead, Jenkins posts the default comments to Stash. I tried customizing several jobs, and I see that the customization is ignored if and only if it's a multi-configuration project. Free-style projects support customized messages.
|Field||Original Value||New Value|
|Assignee||Pavel Roskin [ proski ]|
|Status||Open [ 1 ]||In Progress [ 3 ]|
|Status||In Progress [ 3 ]||In Review [ 10005 ]|
|Labels||configuration||configuration matrix stash|
|Resolution||Fixed [ 1 ]|
|Status||In Review [ 10005 ]||Resolved [ 5 ]|