Encourage false positives of the error dialog to result in tickets

.env.example

@@ -1,6 +1,7 @@
 # To enable CSS hot-reload, set the following variable to 1.
 CSS_HOT_RELOAD=1
-# To use the annoying and inconsistent full page error dialog, set this to 1.
+# To use the full page error dialog, set this to 1. Please report false positives to
+# the issue tracker for handling.
 FULL_PAGE_ERRORS=0
 # To use a single theme, uncomment the line with the theme you want to hot-reload.
 MATRIX_THEMES='light'