When I insert images from a file on HDD, the image is inserted (not very correctly, but that's another issue) and when I close the file dialog, the Writer shows the first page, regardless of the page I insert the image.
I can't reproduce this bug. When I insert the picture, the focus is on the same page and the image is selected. LO: Version 3.6.1.2 (Build ID: e29a214) Marking as WORKSFORME. If this is still an issue for you with latest release please reopen as UNCONFIRMED and I'll get a second person to check it out from QA. Thanks for helping out.