Philodendron New Leaves Yellowing & Dying: Need Species ID

Large philodendron (3.5 ft) with new leaves yellowing/dying at 6" = abnormal. Need to know:

Critical Questions

Which species? Philodendron selloum (tree type) or Monstera deliciosa (split leaf)? Photo to wcreed@HorticulturalHelp.com.
Repotted after purchase?
New leaves from bottom? Philodendrons grow from top—basal shoots are offsets.

Species ID + photo will unlock the solution.

House Plants: Gardenia New Leaf Wrinkling: Watering Balance in Australia; Dendrobium Yellow Leaves and Brown Stem: Evergreen Type Care; Cyclic Yellowing in Cephalotus: Heat Stress, Light Intensity, and Terrarium Conditions; Yellow Leaves on New Nepenthes ventricosa: Normal Aging; Troubleshooting Peace Lily Yellow Tips and Small New Leaves; Philodendron Selloum (Tree Philodendron): Light, Water, and Fertilizer Fixes; African Violet Yellow Leaves: Pot Size Is the Problem; Silver Philodendron Yellowing: Water, Pests, and ID; Diagnosing and Saving a Split-Leaf Philodendron with Root Rot; Philodendron New Leaves Stuck in Sheaths: Causes and Fixes

Garden Articles

Plants

Cause	Likely If...
Overwatering/root rot	Repotted into large pot, soil stays wet
Low light	Only 1 hr direct, reflected rest of day
Nutrient deficiency	No fertilizer 4 months, but unlikely this fast