"Manufacturing Defect?" token, awarded by Daniel_Mietchen.
instead of the expected -1.23±0.35.
This looks similar to T119226, but since I can't see any scientific notation involvement, I am filing this separately for the moment.
Probably this is a bug of QuickStatements, whose bug is not tracking here, but at https://bitbucket.org/magnusmanske/wikidata-todo/issues?q=quick.
thiemowmde triaged this task as High priority.
thiemowmde added subscribers: thiemowmde, Smalyshev, daniel, Lydia_Pintscher.
I can confirm the described behavior and uploaded a patch that aims to fix the underlying issue in the Wikibase code base, see https://github.com/DataValues/Number/pull/115.
However, there is a super-trivial thing you can do, @Magnus: Please submit quantity values as strings, not numbers.
By coincidence, I submitted a patch for this on Saturday: D911: Send quantities as strings.
BTW that seems to be the problem on QS v1 too. If the simple fix with strings above works, maybe can be ported to quick_statements.php too, so we won't get bad data from that one too.
Just needs a data-values/number release now.