Because she has been on 12/12 then put back to 18/6 she is going back to re-veg, good chance she may of hermied at this point to due to stress.
automatics dont care about light shedule the only downside is that she will yield less due to the period under 12/12
in soil you should aim for PH 6.5 and 118 days is quiet old already ....that new growth is bizar it misses also the typical cannabis serrations ... some kind of foxtail it seems ... id snip it off so the energy goes to the better buds below ... it can be considered as backbuilding ...
anyway the 12/12 will have definately hurt final result as thats the main advantage of autos (longer light shedule = bigger buds without risk of hermie or reveg)