**Steps to replicate the issue** (include links if applicable):
* go to https://stats.wikimedia.org/#/en.wikisource.org/reading/unique-devices/normal|line|2-year|~total|monthly or the same page for any other project
**What happens?**:
* We see a sharp spike for the month of May 2025 and is continuing.
**What should have happened instead?**:
* The chart should reflect an accurate unique device count with slight increase or decrease. The fix for this issue is happening in T395934
**Other information** (browser name/version, screenshots, etc.):
{F60980419}
Also noting, that the "values under 1000 are not reported to preserve accuracy" message that appears is inaccurate, because, well, 0 < 1000. I suppose perhaps there is code in place that //should// prevent the 0 from being shown.
This may be a RESTbase metrics problem.