This was fixed with the most current release, LR 2015.1.1. Have you updated to that version?
As John says, Adobe claims this is fixed in the most recent update.
Finding a replacement for Bridge is not an option. Any program monitoring the export directory tends to cause the conflict; Bridge is just one of the common apps that was noticed frequently. I had the problem every now and then without Bridge even being installed.
Urgh! I did check this before posting here: Creative cloud was reporting that photoshop & lightroom were up to date. Later I checked and photoshop was 2015.0.0. I restarted the creative cloud app and suddenly photoshop wasn't up to date.
I just tried it with a couple of files and they, at least, worked.
I also tried "edit in photoshop" and "open as layers" and they seem less flaky than they were. I hope this will also fix a photoshop issue I had where files in bridge would occasionally not open, either by double clicking or drag and drop.
The one good thing about this is that the wobblyness of the .0 versions of cc2015 has reminded me not to install windows 10