Thank you very much for finding this. I just tried to make lxpanel-dev to be 'Multi-Arch: same' but apparently I was wrong and it should be marked 'Multi-Arch: no' instead, leaving its dependency on lxpanel as it used to be.
- Bug#985517: lxpanel-dev: broken symlink: /usr/lib/x86_64-... Andreas Beckmann
- Bug#985517: lxpanel-dev: broken symlink: /usr/lib/x8... Andriy Grytsenko