I've noticed two different instances recently in which the GENFIXes done by AWB have introduced line break errors.
The first was related to a transcluded section, where, it's necessary to have only a single line break afterwards, or else an extra space is created. AWB [[ https://en.wikipedia.org/w/index.php?title=Traditions_of_Pomona_College&diff=985786718&oldid=984990690&diffmode=source | added an erroneous extra line break ]], creating a gap.
The second instance was caused by the existence of a hidden comment at the end of a section. Again, AWB [[ https://en.wikipedia.org/w/index.php?title=Pomona_College&diff=985786297&oldid=985550480&diffmode=source | created an extra line break ]] (between the history and campus sections).
Given how widely GENFIXes are applied, any bugs it introduces seem cause for concern.