Whenever your level is changed from moving around in a zone, the “Signet Precision” buff (gained by activating signets as a warrior with the “Signet Mastery” trait) disappears.
The functionally similar buff “Furious Surge” (granted from critical hits with the “Furious” trait) does not disappear when your level changes, and considering they both give a stat boost (Signet Precision says it gives 100 precision and Furious Surge says it gives 10 condition damage,) it doesn’t seem far-fetched to think that one persisting means the other can, too.