Gimp 3.0RC1 printing not working

I have installed Gimp 3.0RC1 flatpak on my system, Linux Mint 22. I’m printing on Canon Pixma Pro 9000 II with the Turboprint printerdriver. All works as it should in Gimp 2.10.38. For Gimp 3.0RC1 the paper just passes through the printer without printing anything on it. I have tried both the beta version and the nightly version with the same result. Is this a bug in Gimp or am i doing something wrong ?

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Update: The problem seemed to be related to Turboprint not working properly with flatpak. I added Panda Jim’s PPA to my system and installed Gimp 3.0RC1 from the software manager. Printing now working as it should.