With new version, date filter grouped by month or year is no longer working

Hi,
I have a form with date.
Group filter by month
Selector dropdown
format : %M %Y
Show number of item : yes
Value not available : deactivated
Prefix for each value : pour la période de

When i have the category, i have all my items and in my form :
Pour la période de Aout 2018 (1)
Pour la période de Sept 2018 (1)

Correct : i have 1 item for each month.
Now, if i select without any other filter a month to only show the item, i have...nothing shown in result...

That's was working before...

EDIT : I found the previous thread when i did this filter : www.flexicontent.org/forum/20-general-su...er.html?limitstart=0

EDIT2 : i test this. If in the field i group for the filter the date by year or by month, the filter is modified in frontend (normal) but any selection show no results. If i group on day, i have all my days and i can select a day correctly. So when i group by month or year, it does not work anymore...

Xavier

its after joomla update or flexicontent update ?

Hi Yannick,
I have updated Joomla to 3.8.4 yesterday and FC to the last version after this.

Xavier

Hello

ok, i have found the issue
it is in different place
this time it is not PHP code
- it is SQL date format code

i ll fix it
but i am not sure why the code stopped working ...

Hello

fixed it
you can use "install via URL" (Joomla extension manager) and install it in a testing website to test it
github.com/FLEXIcontent/flexicontent-cck...e/3.2.1.x-stable.zip

Hi Georges,
Thanks for this. As i'm on the final stage of dev on the site with the last version of FC, is there a risk to install this fix ?.
Anyway, i'm going to backup the full site and install it : if i have big issue, i will roll back.

Thanks again Georges
Xavier