Problems with leaves.

Is anyone familiar with what this might be?

Well its not just one thing going on.

There's indication of nitrogen toxicity. Theres also some nutrient lock up or deficiency-cal-mag.

Then there's the curled edge of the leafs! Pretty sure thats VPD, vapor pressure deficit. Can cause many nutrient issues. Like all i mentioned above.

The vpd is likely off but this is happening on only 1/5 plants. Average temp 89 degrees. Humidity around 65-70. Thought it was mag so fed with a heavy feeding of cal-mag, got kinda worse? Using Fox Farm Ocean Forest. Soil seems to be pretty moist and it has been a while since I watered.

Well soggy soils are an indicator of acidic soils....

Its a pH thing likely.

Liquid cal-mags are usually nitrate based so potentially worsening nitrogen toxicity and keeping pH acidic.

Might consider dolomite lime. Its calcium carbonate and magnesium carbonate. It will buffer your soil pH upward and give cal-mag.