How much cinnamon did you use and where were they applied?
Cinnamon contains a phytochemical called cinnamaldehyde that acts as a natural fungicide, true, but it also has properties of a desiccant and a growth inhibitor.
---------- Post added at 11:25 AM ---------- Previous post was at 11:21 AM ----------
That red egg-like object is a grain of reddish sand.
The black edge on the petiole is nothing to worry about, but it is possibly from past fungal damage.
The darkening roots is because the media is probably staying too wet.
The browning tips of the leaves, I can't see.
There is nothing wrong with the crown.
---------- Post added at 11:27 AM ---------- Previous post was at 11:25 AM ----------
I'm doing a little thinking...
I believe the "browning" you mention might be anthocyanin pigmentation.
---------- Post added at 11:28 AM ---------- Previous post was at 11:27 AM ----------
The tiny white insects are probably springtails.
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Philip
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