diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
index e28c951f3..2f9186a2a 100644
--- a/src/hb-ot-layout-gpos-table.hh
+++ b/src/hb-ot-layout-gpos-table.hh
@@ -1586,7 +1586,15 @@ struct PairPosFormat2
 
 
     /* Isolate simple kerning and apply it half to each side.
-     * Results in better cursor positinoing / underline drawing. */
+     * Results in better cursor positinoing / underline drawing.
+     *
+     * Disabled, because causes issues... :-(
+     * https://github.com/harfbuzz/harfbuzz/issues/3408
+     * https://github.com/harfbuzz/harfbuzz/pull/3235#issuecomment-1029814978
+     */
+#ifndef HB_SPLIT_KERN
+    if (0)
+#endif
     {
       if (!len2)
       {
diff --git a/test/shape/data/aots/tests/gpos2_2.tests b/test/shape/data/aots/tests/gpos2_2.tests
index ea8ec3cce..6a3084c63 100644
--- a/test/shape/data/aots/tests/gpos2_2.tests
+++ b/test/shape/data/aots/tests/gpos2_2.tests
@@ -2,4 +2,4 @@
 ../fonts/gpos2_2_font2.otf;--features="test" --single-par --no-clusters --no-glyph-names --ned;U+0011,U+0013,U+0014,U+0011,U+0013,U+0012,U+0014,U+0011;[17|19@1300,0|20@3000,-100|17@4500,0|19@5800,0|18@7500,0|20@9000,-100|17@10500,0]
 ../fonts/gpos2_2_font3.otf;--features="test" --single-par --no-clusters --no-glyph-names --ned;U+0011,U+0013,U+0014,U+0011,U+0013,U+0012,U+0014,U+0011;[17|19@1500,0|20@2800,-100|17@4300,0|19@5800,0|18@7100,0|20@8600,-100|17@10100,0]
 ../fonts/gpos2_2_font4.otf;--features="test" --single-par --no-clusters --no-glyph-names --ned;U+0012,U+0012,U+0012,U+0012;[18@-100,0|18@1500,-100|18@2900,0|18@4500,-100]
-#../fonts/gpos2_2_font5.otf;--features="test" --single-par --no-clusters --no-glyph-names --ned;U+0012,U+0012,U+0012,U+0012;[18@-100,0|18@1400,0|18@2900,0|18@4500,0]
+../fonts/gpos2_2_font5.otf;--features="test" --single-par --no-clusters --no-glyph-names --ned;U+0012,U+0012,U+0012,U+0012;[18@-100,0|18@1400,0|18@2900,0|18@4500,0]
diff --git a/test/shape/data/in-house/tests/positioning-features.tests b/test/shape/data/in-house/tests/positioning-features.tests
index 5be8ea780..1021a450d 100644
--- a/test/shape/data/in-house/tests/positioning-features.tests
+++ b/test/shape/data/in-house/tests/positioning-features.tests
@@ -1,3 +1,3 @@
-../fonts/53a91c20e33a596f2be17fb68b382d6b7eb85d5c.ttf;;U+0041,U+0056;[A=0+665|V=1@-40,0+635]
+../fonts/53a91c20e33a596f2be17fb68b382d6b7eb85d5c.ttf;;U+0041,U+0056;[A=0+625|V=1+675]
 ../fonts/f79eb71df4e4c9c273b67b89a06e5ff9e3c1f834.ttf;;U+006D,U+0315;[m=0+945|uni0315=0@32,-178+0]
 ../fonts/ea3f63620511b2097200d23774ffef197e829e69.ttf;;U+0079,U+0325;[y=0+565|uni0325=0@-422,-240+0]