diff --git a/TeXmacs/progs/math/math-edit.scm b/TeXmacs/progs/math/math-edit.scm
index b4f8164277..30b35055ac 100644
--- a/TeXmacs/progs/math/math-edit.scm
+++ b/TeXmacs/progs/math/math-edit.scm
@@ -40,7 +40,7 @@
            (let* ((s (tm->string b))
                   (last (and (!= s "") (tmstring-reverse-ref s 0)))
                   (type (and last (math-symbol-type last))))
-             (nin? type (list "prefix" "infix" "separator" "prefix-infix"
+             (nin? type (list "prefix" "infix" "prefix-infix"
                               "opening-bracket" "middle-bracket"))))))
 
 (tm-define (skip-decorations-leftwards t)
diff --git a/devel/201_101.md b/devel/201_101.md
new file mode 100644
index 0000000000..bd8ca3c514
--- /dev/null
+++ b/devel/201_101.md
@@ -0,0 +1,15 @@
+# #3027 Fix: Allow spaces after separator symbols in math mode
+
+## 2026/03/26
+
+## What
+Updated `allow-space-after?` in `math-edit.scm` to permit space insertion after symbols classified as `"separator"`.
+
+## Why
+In math mode, spaces could not be inserted after certain symbols such as commas (`,`), while other punctuation like periods (`.`) allowed spacing. This inconsistency was caused by `"separator"` symbols being explicitly excluded from allowing spaces, leading to unintuitive typing behavior.
+
+## How
+Removed `"separator"` from the exclusion list in `allow-space-after?`. This enables normal space insertion after separator symbols, including `,`, `;`, and `:`.
+
+## Test
+- Verified space insertion after `,`, `;`, `:` works correctly.