Cool - first regression we know right now. you might downgrade to sid. (libfm-qt, pcmanfm-qt, lxqt-qtplugin and lximage-qt and pin the packages)
Reason:
We have rewritten big parts of it and had to release it because of the release Qt 5.11 - the 0.12.x sources will just not build with Qt 5.11. Used the packages in the development process, but no one noticed that regression. One can expect some faults in 0.13.0, of course - there should be none, but ... If you look into the latest changes - it will look like a chain saw massacre - it is a ongoing battle - next big changes are just merged. Ok, the next big undertaking should™ not introduce regressions, but who knows.
(
https://github.com/lxqt/lxqt/issues/1497) - after that i will merge and test some things that are new in libfm-qt and pcmanfm-qt. Right now we are bleeding edge regarding pcmanfm-qt in siduction.
EDIT: And yes, any help is appreciated. Should not be a big deal, it was expected that some things will break, we thought that we fixed the most of them, shit happend. It's not a everyday job to replace the old libfm c code with libfm-qt c++ one
However, will look into it soon, after i've merged the latest changes.