Fix crash reported by RageShake

CHANGES.md

@@ -10,6 +10,7 @@ Improvements 🙌:
 Bugfix 🐛:
  - Fix invisible toolbar (Status.im theme) (#1746)
  - Fix relative date time formatting (#822)
+ - Fix crash reported by RageShake
 
 Translations 🗣:
  - Add PlayStore description resources in the Triple-T format, to let Weblate handle them

vector/src/main/java/im/vector/app/features/login/LoginCaptchaFragment.kt

@@ -77,6 +77,10 @@ class LoginCaptchaFragment @Inject constructor(
             override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                 super.onPageStarted(view, url, favicon)
 
+                if (!isAdded) {
+                    return
+                }
+
                 // Show loader
                 loginCaptchaProgress.isVisible = true
             }
@@ -84,6 +88,10 @@ class LoginCaptchaFragment @Inject constructor(
             override fun onPageFinished(view: WebView, url: String) {
                 super.onPageFinished(view, url)
 
+                if (!isAdded) {
+                    return
+                }
+
                 // Hide loader
                 loginCaptchaProgress.isVisible = false
             }