constant water at leaf intersection on phrag. besseae

[bard]

I am growing my phrag besseae in pure diatomite in a 4" clay pot sitting in 3/4" of rain water. It is growing beautifully and has been for over 2 years, repotted last June. It blooms regularly in the early spring. My concern is this I recently noticed water at intersection where the newest leaf joins the one before it. It seems to be present at all times. I don't recall seeing this before and wonder if it may be problematic. The plant is in a large, homemade growing case with an average RH of 75%, daytime winter temp of 72f and night of 58f, full spectrum lighting and several fans for air movement.