Just did some further testing that may help track this down. Reason downgrading on ubuntu didn't help is that I wasn't paying close attention and downgraded to 4.11, and not 4.10 since 4.10 wasn't in the package repository.
What this indicates to me is that the problem was introduced between 4.10.x and 4.11.6.
Now that I can reproduce the fix, I'll take a look and see if I can bisect for you. (Assuming I can get xfdesktop built.)
Just did some further testing that may help track this down. Reason downgrading on ubuntu didn't help is that I wasn't paying close attention and downgraded to 4.11, and not 4.10 since 4.10 wasn't in the package repository.
What this indicates to me is that the problem was introduced between 4.10.x and 4.11.6.
Now that I can reproduce the fix, I'll take a look and see if I can bisect for you. (Assuming I can get xfdesktop built.)