Hi @byzgl,
I’m sorry for the late reply.
Unfortunately, this plugin does not support post type actions (delete, save, update) in order to perform a flush.
These actions are and should be taken care of by W3 Total Cache itself.
I’m afraid you’d have to contact W3 Edge directly on this issue; or leave a message in their support forums.
Just to be sure, do check if your custom post type is marked public. I haven’t dug into their code in a long time, but I believe this was a requirement.
Please do note that they’re very busy and can’t handle most support questions.
I hope this helps (in some way). Have a wonderful day!
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This reply was modified 8 years ago by Sybre Waaijer. Reason: typo