If you notice the yellowing of leaves right after repotting the plant, it could be because of the transplant shock.
What You’ll See: Yellow spots on the leaves of entire pale foliage along with the stems.
Solution: Avoid repotting the plant in winters. While transplanting, use a fresh and well-draining potting mix and snip away damaged roots. After transplanting, avoid keeping the plant in direct sunlight, and do not expose it to too hot or cold air.
9. Fungal Infection

The leaves will also turn pale due to a fungal infection. It may spread slowly and will leave behind yellow spots on the foliage.
What You’ll See: Black splotches or dark brown spots with a ‘halo’ or ring in yellow or cream color on the leaves.
Solution: Snip away the affected leaves to stop the infection from spreading. Avoid wetting the foliage too much.
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