thumb picture not show on a category display

Is there any configuration witch allow to display thumbnail picture on a catégory ?
It look it's from joomla 4 a problem with space in names of the picture. 
If I rename the picture and delete the space the thumnail is display.
The problem is that I have many item to modified!
Is there any configuration to do? 

on the capture attached you can see the item in left has no picture  and le item in right position disply an other picture

name of the left pic: carnaval 1-8.jpg   
with a space in front of 1-8

name of right pic: sxm-grand_case--04.jpg
with no space

can you help me?

Nota thi s occured only for picture update with jce 

maybe you need to use rereplacer by regular lab, and create rule to correction url ?

Thank you, but sorry I don't know how to do this?

its a not a flexicontent bug but you need to remove sapce in your name => rerepacer is an extension to alow a search and replace in your site

Thank you for suggestion but where can I found this extension? 
How it work?

please do a simple search on google ...
regularlabs.com/rereplacer
all is here