Sorry - I previously looked at your post on my (small) phone, and didn't see clearly
First pic - there's often a little nub at the top of pbulbs, they don't grow - BUT yours does look like something might be growing there - wait and see
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Typically, new growth comes from the base of the most recently matured pbulbs.
Second and third pix - look like aborted spikes; could be from 'stress' - change in environment, cold draft, warm draft, too little or too much water, sudden extreme change in temps, etc - and sometimes it just happens ...