fix(GODT-2328): Ignore labels that aren't part of user label set

Changelog.md

@@ -5,6 +5,7 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 ## [Bridge 3.0.13] Perth Narrows
 
 ### Fixed
+GODT-2328: Ignore labels that aren't part of user label set.
 GODT-2326: Sync issue on missing fresh DB file.
 GODT-2319: Seed the math/rand RNG on app startup.
 GODT-1804: Preserve MIME parameters when uploading attachments.

internal/user/sync.go

@@ -463,6 +463,11 @@ func wantLabel(label proton.Label) bool {
 
 func wantLabels(apiLabels map[string]proton.Label, labelIDs []string) []string {
 	return xslices.Filter(labelIDs, func(labelID string) bool {
-		return wantLabel(apiLabels[labelID])
+		apiLabel, ok := apiLabels[labelID]
+		if !ok {
+			return false
+		}
+
+		return wantLabel(apiLabel)
 	})
 }