diff --git a/draftlogs/6912_fix.md b/draftlogs/6912_fix.md
new file mode 100644
index 00000000000..a7a779ad3f7
--- /dev/null
+++ b/draftlogs/6912_fix.md
@@ -0,0 +1 @@
+- Fix undesired behaviour introduced in [#6885](https://github.com/plotly/plotly.js/pull/6885) where `tickson: 'boundaries'` were ignored when used with `ticksmode: 'array'` and `showgrid: true`. This feature was anonymously sponsored: thank you to our sponsor!
\ No newline at end of file
diff --git a/src/plots/cartesian/axes.js b/src/plots/cartesian/axes.js
index 2d86405eb12..30ed7b8f518 100644
--- a/src/plots/cartesian/axes.js
+++ b/src/plots/cartesian/axes.js
@@ -1293,10 +1293,7 @@ function arrayTicks(ax, majorOnly) {
         for(var i = 0; i < vals.length; i++) {
             var vali = tickVal2l(vals[i]);
             if(vali > tickMin && vali < tickMax) {
-                var obj = text[i] === undefined ?
-                        axes.tickText(ax, vali) :
-                        tickTextObj(ax, vali, String(text[i]));
-
+                var obj = axes.tickText(ax, vali, false, String(text[i]));
                 if(isMinor) {
                     obj.minor = true;
                     obj.text = '';
@@ -1624,6 +1621,10 @@ axes.tickText = function(ax, x, hover, noSuffixPrefix) {
     var tickVal2l = axType === 'category' ? ax.d2l_noadd : ax.d2l;
     var i;
 
+    var inbounds = function(v) {
+        var p = ax.l2p(v);
+        return p >= 0 && p <= ax._length ? v : null;
+    };
     if(arrayMode && Lib.isArrayOrTypedArray(ax.ticktext)) {
         var rng = Lib.simpleMap(ax.range, ax.r2l);
         var minDiff = (Math.abs(rng[1] - rng[0]) - (ax._lBreaks || 0)) / 10000;
@@ -1633,6 +1634,11 @@ axes.tickText = function(ax, x, hover, noSuffixPrefix) {
         }
         if(i < ax.ticktext.length) {
             out.text = String(ax.ticktext[i]);
+
+            out.xbnd = [
+                inbounds(out.x - 0.5),
+                inbounds(out.x + ax.dtick - 0.5)
+            ];
             return out;
         }
     }
@@ -1674,11 +1680,6 @@ axes.tickText = function(ax, x, hover, noSuffixPrefix) {
     // Setup ticks and grid lines boundaries
     // at 1/2 a 'category' to the left/bottom
     if(ax.tickson === 'boundaries' || ax.showdividers) {
-        var inbounds = function(v) {
-            var p = ax.l2p(v);
-            return p >= 0 && p <= ax._length ? v : null;
-        };
-
         out.xbnd = [
             inbounds(out.x - 0.5),
             inbounds(out.x + ax.dtick - 0.5)
@@ -2807,7 +2808,7 @@ function getBoundaryVals(ax, vals) {
     // boundaryVals are never used for labels;
     // no need to worry about the other tickTextObj keys
     var _push = function(d, bndIndex) {
-        var xb = d.xbnd ? d.xbnd[bndIndex] : d.x;
+        var xb = d.xbnd[bndIndex];
         if(xb !== null) {
             out.push(Lib.extendFlat({}, d, {x: xb}));
         }
@@ -3755,7 +3756,7 @@ axes.drawLabels = function(gd, ax, opts) {
                 // TODO should secondary labels also fall into this fix-overlap regime?
 
                 for(i = 0; i < lbbArray.length; i++) {
-                    var xbnd = (vals && vals[i].xbnd) ? vals[i].xbnd : [null, null];
+                    var xbnd = vals[i].xbnd;
                     var lbb = lbbArray[i];
                     if(
                         (xbnd[0] !== null && (lbb.left - ax.l2p(xbnd[0])) < gap) ||
diff --git a/test/image/baselines/zz-tickson_boundaries_showgrid_categorical.png b/test/image/baselines/zz-tickson_boundaries_showgrid_categorical.png
index 8d4fb1d90df..6f32be16bf8 100644
Binary files a/test/image/baselines/zz-tickson_boundaries_showgrid_categorical.png and b/test/image/baselines/zz-tickson_boundaries_showgrid_categorical.png differ