I think it happened to me with Impress few weeks ago.
Try to create a new page and insert the pic there. Then copy and paste it in the desired location.
I think there may be some shape selected or at least remaining selected for AOO and then the pic is inserted as background of that shape.
Haven't tried to investigate however.
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[Solved] at the beginning of the title in your
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AOO 4.1.6 on Xubuntu 18.10 and 4.1.5 on Windows 7 (with winPenPack port).