diff --git a/java/src/processing/mode/java/ErrorChecker.java b/java/src/processing/mode/java/ErrorChecker.java
index 015673ed3..1302dd773 100644
--- a/java/src/processing/mode/java/ErrorChecker.java
+++ b/java/src/processing/mode/java/ErrorChecker.java
@@ -277,9 +277,16 @@ public class ErrorChecker {
             String q = matcher.group();
             int tabStart = in.startTabOffset + offset;
             int tabStop = tabStart + 1;
+            int line = ps.tabOffsetToTabLine(in.tabIndex, tabStart);
+            
             // Prevent duplicate problems
-            if (problems.stream().noneMatch(p -> p.getStartOffset() == tabStart)) {
-              int line = ps.tabOffsetToTabLine(in.tabIndex, tabStart);
+            boolean isDupe = problems.stream()
+              .filter(p -> p.getTabIndex() == in.tabIndex)
+              .filter(p -> p.getLineNumber() == line)
+              .findAny()
+              .isPresent();
+
+            if (isDupe) {
               String message;
               if (iproblem.getID() == IProblem.UnterminatedString) {
                 message = Language.interpolate("editor.status.unterm_string_curly", q);
diff --git a/java/src/processing/mode/java/lsp/PdeAdapter.java b/java/src/processing/mode/java/lsp/PdeAdapter.java
index 24dc2e1d6..9e8942e27 100644
--- a/java/src/processing/mode/java/lsp/PdeAdapter.java
+++ b/java/src/processing/mode/java/lsp/PdeAdapter.java
@@ -233,13 +233,13 @@ class PdeAdapter {
             new Position(
               prob.getLineNumber(),
               PdeAdapter
-                .toLineCol(code.getProgram(), prob.getStartOffset())
+                .toLineCol(code.getProgram(), prob.getTabStartOffset().get())
                 .col - 1
             ),
             new Position(
               prob.getLineNumber(),
               PdeAdapter
-                .toLineCol(code.getProgram(), prob.getStopOffset())
+                .toLineCol(code.getProgram(), prob.getTabStopOffset().get())
                 .col - 1
             )
           ),