Tirzaman, any luck with applying the system reset? I am experiencing similar problems with 790 since I deployed the third LH, but I'm still "investigating" and want to keep the system reset as a last resort measure...
I thought I'll upload my floor plan so that maybe someone will offer some advice re. my problem. Everything was working fine, when there were only 2 LHs (A + B) and bathroom doors (4) were shut (so bathroom wasn't cleaned at all). With that config roomba cleaned 1, then 2 and 3, finally docking. Then I decided that I will test cleaning all of the rooms in one session and added 3rd LH C in the way pictured above. I had to half-open doors to bathroom (4) (as pictured) because with full-opened doors there was too little space for roomba to access lighthouse A and room 3. With doors half-open the space was just enough, at least I think so. But what happened - roomba started cleaning room 1 (encountering all 3 lighthouses and not crossing them), then went to room 2, then went back to clean some i room 1 again, ignored rooms 3 and 4 and docked. I tried twice with the same results.
Could it be because there's too much obstacles around LH A and C? Or something got messed up with roomba's mind after adding 3rd LH? Do you see any other configurations of LHs that would allow me to clean all without manual interventions?
Thx in advance for help.