Looking at , it seems that stated in (P248) is missing. See Help:Sources#Databases. reference URL (P854) isn't needed.
Topic on User talk:Ladsgroup
It's because P:P3522 doesn't have P:P1629. Look at another edit for example: . Worse case, we can edit it later and add that.
Given the problem with WMF infrastructure, one shouldn't rely on edits being fixed later, especially if they are done by bot.
One could check in advance if information is available or needs to be completed first.
It still seems to do it, even when there are P1629 values:
Please have a look at Reinheitsgebot, it does similar statement additions.
I left a note about it at Wikidata:Requests for permissions/Bot/Dexbot 14