page4
First image: it's smaller than the page. Selecting both, image and shape and performing Right click → Shapes → connect (2nd form function) you'll obtain the expected result. (5.3.6,1 weird)
Second image: it's the same than before, but it was enlarged
Now, selecting both, enlarged image and shape and doing Right click → Shapes → connect (2nd form function, german verbinden) you'll obtain weird results… (5.3.6.1 weird)
Third image: originally larger than the page. Selecting both, picture and shape and doing Right click → Shapes → connect (2nd form function, in german verbinden ) you will get weird results (5.3.6,1 very weird)