Okay lay off the foliar feeding for now.
What is your fert solution and runoff pH?
If you are concerned about waterlogging the plants, punch holes in the SIDES of the pots too, but if you have a pH problem (likely) you WILL need to flush.
Treat with Serenade (Bacillus subtilis and YAY! It's OMRI listed organic!) to combat root rot without overdoing the other stuff.