Polystat : name of elements are the same since v2.1.1

[sebbz42]

Hello,

Edit : same case as #309, sorry. i close this one.

Since v2.1.1 i have some trouble with name of items. All are screens as the name of 1st.

We use polystat to monitor some events logged in a mySQL database.
if log are 5 minutes old, polygon turn yellow then red after 15 minutes

request:
SELECT damo_data
,case when damo_MAJ < (NOW() - INTERVAL 15 MINUTE) then 2
when damo_MAJ < (NOW() - INTERVAL 5 MINUTE) then 1
else 0 end as " "
FROM da_monitoring

I get this table view:

all polygons shows the same name.

Is there a trick the obtain the right name ? is it a bug ?
regards
Sebastien