This keeps happening to me. I thought at first it was truncating at punctuation, but no.
For example, last night I copy-and-pasted a better transcription of a death record into the sources sections for the children it mentioned. (Yes, the father's death record listed all of his then-living children and their husbands. I could wish they all did that!) I dutifully wrote out "better transcription of father's death record" for one, and that's what the change log says for that profile. For two others, I *thought* I chose that same reason from the drop-down list of recently used text, but what the change log says for them is "better".
I'm certain that I would have noticed if the "explain your changes" box had just said "better" when I clicked "save changes", so obviously, that's not what showed on my screen. So why did the reason get truncated like this? What did I do wrong, and how? Is this a result of a bad alchemical reaction between my browser (Firefox) and WikiTree?