diff --git a/Sources/Common/Debug.swift b/Sources/Common/Debug.swift
index 096397683..9a1884f20 100644
--- a/Sources/Common/Debug.swift
+++ b/Sources/Common/Debug.swift
@@ -40,13 +40,11 @@ public func breakByRaisingSigInt(_ description: String, file: StaticString = #fi
 #if DEBUG
 
 // get symbol from stack trace for a caller of a calling method
-public func callingSymbol() -> String {
+public func callingSymbol(after lastSymbolName: String? = nil) -> String {
     let stackTrace = Thread.callStackSymbols
     // find `callingSymbol` itself or dispatch_once_callout
-    var callingSymbolIdx = stackTrace.firstIndex(where: { $0.contains("_dispatch_once_callout") })
-    ?? stackTrace.firstIndex(where: { $0.contains("callingSymbol") })!
-    // procedure calling `callingSymbol`
-    callingSymbolIdx += 1
+    var callingSymbolIdx = lastSymbolName.flatMap { lastSymbolName in stackTrace.lastIndex(where: { $0.contains(lastSymbolName) }) }
+    ?? stackTrace.firstIndex(where: { $0.contains("callingSymbol") })! + 1 // procedure calling `callingSymbol`
 
     var symbolName: String
     repeat {
diff --git a/Sources/Navigation/Extensions/WKFrameInfoExtension.swift b/Sources/Navigation/Extensions/WKFrameInfoExtension.swift
index b2badbff0..b5698c08b 100644
--- a/Sources/Navigation/Extensions/WKFrameInfoExtension.swift
+++ b/Sources/Navigation/Extensions/WKFrameInfoExtension.swift
@@ -57,7 +57,8 @@ public extension WKFrameInfo {
         method_exchangeImplementations(originalRequestMethod, swizzledRequestMethod)
 
         // ignore `request` selector calls from `safeRequest` itself
-        ignoredRequestUsageSymbols.insert(callingSymbol())
+        let callingSymbol = callingSymbol(after: "addSafetyCheckForSafeRequestUsageOnce")
+        ignoredRequestUsageSymbols.insert(callingSymbol)
         // ignore `-[WKFrameInfo description]`
         ignoredRequestUsageSymbols.insert("-[WKFrameInfo description]")
     }()
diff --git a/Sources/Navigation/Extensions/WKNavigationActionExtension.swift b/Sources/Navigation/Extensions/WKNavigationActionExtension.swift
index 56b35eb94..31ffbce67 100644
--- a/Sources/Navigation/Extensions/WKNavigationActionExtension.swift
+++ b/Sources/Navigation/Extensions/WKNavigationActionExtension.swift
@@ -60,8 +60,9 @@ extension WKNavigationAction: WebViewNavigationAction {
         let swizzledSourceFrameMethod = class_getInstanceMethod(WKNavigationAction.self, #selector(WKNavigationAction.swizzledSourceFrame))!
         method_exchangeImplementations(originalSourceFrameMethod, swizzledSourceFrameMethod)
 
+        let callingSymbol = callingSymbol(after: "addSafetyCheckForSafeSourceFrameUsageOnce")
         // ignore `sourceFrame` selector calls from `safeSourceFrame` itself
-        ignoredSourceFrameUsageSymbols.insert(callingSymbol())
+        ignoredSourceFrameUsageSymbols.insert(callingSymbol)
         // ignore `-[WKNavigationAction description]`
         ignoredSourceFrameUsageSymbols.insert("-[WKNavigationAction description]")
     }()