I am so sorry to trouble you that we did not described the phenomenon clearly.
The notification [Waiting for job to complete] is not displayed at Mate's desktop, but displayed in CUPS page (localhost:631) -> [Printers] tab -> [Status] column.
*Please refer to the attachment image for details.
By the way, we have confirmed that this problem does not be occured on Ubuntu 18.04LTS.
So we judge this is a CUPS/OS issue.Could you help us to confirm it again?
Dear Till,
I am so sorry to trouble you that we did not described the phenomenon clearly.
The notification [Waiting for job to complete] is not displayed at Mate's desktop, but displayed in CUPS page (localhost:631) -> [Printers] tab -> [Status] column.
*Please refer to the attachment image for details.
By the way, we have confirmed that this problem does not be occured on Ubuntu 18.04LTS.
So we judge this is a CUPS/OS issue.Could you help us to confirm it again?
Thank you in advance!