Context: on Wikidata, I often correct the capitalization of the label, for instance replacing "Parc" by "parc". In this case, the size change should be 0 and often it is 0 but sometimes I have strange numbers.

Example: for this diff https://www.wikidata.org/w/index.php?diff=1060488000 in the history https://www.wikidata.org/w/index.php?title=Q2443063&action=history it shows -28

I've looked for hidden characters who could explain this but I see nothing (and my script shouldn't touch these invisible character anyway).