This seems to be a recurring problem for me. First of all Stacks, RW, and El Capitan are current and up to date.This problem was happening in Yosemite as well.
Using Foundation on a one page site. When I go to the page inspector and click on one of the arrows to expand the options, the options expand for a millisecond and then close again. This happens with all my stacks. Sometimes they work properly expanding but most times they don’t.
I’ve closed RW 6.3.7 and reopened it - same problem, reinstalled it but same problem. I’ve rebooted, same problem. I’ve opened other RW projects, same problem. (sure am getting tired of writing ‘same problem’)
The strange thing is that very occasionally the inspector works as it should and I don’t know why.
Any help would be much appreciated.