Corn plant (Dracaena) leaves turning yellow at the tips

Corn plant near window facing east. When some leaf ends turned yellow..I trimmed them correctly…but the yellow came back even more! Have very many house plants for years and never experienced this before. Is it possible, it’s diseased?…

Help with corn plant

I inherited the enclosed plant. It used to have leaves on the top off the stem that fell off . could you name this plant & tell me how to manage it, should I cut the stem?