I have a few questions that I hope you can answer for me. Is the discoloration of the stems due to the colder temperature at night? If the leaves are drooping down, does that mean too much or too little water?
Cold temps can make leaves droopy and wilted a bit. When water them water an around circle of leaves not under main stem. Increases root zone naturally.
Leaves look heavy, but maybe Rh is lower than 65, it could be that too, heavy leaves from water and dry air ...
Good luck !