diff --git a/README.md b/README.md
index 0e3bf45c..ed23baf2 100644
--- a/README.md
+++ b/README.md
@@ -137,7 +137,12 @@ information on what to include when reporting a bug.
    non-printable keys (#1598)
  - [X11] Bugfix: Function keys were mapped to `GLFW_KEY_UNKNOWN` for some layout
    combinaitons (#1598)
+ - [X11] Bugfix: Keys pressed simultaneously with others were not always
+   reported (#1112,#1415,#1472,#1616)
  - [Wayland] Bugfix: Repeated keys could be reported with `NULL` window (#1704)
+ - [Wayland] Bugfix: Retrieving partial framebuffer size would segfault
+ - [Wayland] Bugfix: Scrolling offsets were inverted compared to other platforms
+   (#1463)
 
 
 ## Contact
@@ -276,6 +281,7 @@ skills.
  - ndogxj
  - Kristian Nielsen
  - Kamil Nowakowski
+ - onox
  - Denis Ovod
  - Ozzy
  - Andri Pálsson
@@ -300,8 +306,10 @@ skills.
  - Eddie Ringle
  - Max Risuhin
  - Jorge Rodriguez
+ - Luca Rood
  - Ed Ropple
  - Aleksey Rybalkin
+ - Mikko Rytkönen
  - Riku Salminen
  - Brandon Schaefer
  - Sebastian Schuberth
diff --git a/src/wl_init.c b/src/wl_init.c
index 97b53673..49e7cc52 100644
--- a/src/wl_init.c
+++ b/src/wl_init.c
@@ -347,9 +347,9 @@ static void pointerHandleAxis(void* data,
            axis == WL_POINTER_AXIS_VERTICAL_SCROLL);
 
     if (axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL)
-        x = wl_fixed_to_double(value) * scrollFactor;
+        x = -wl_fixed_to_double(value) * scrollFactor;
     else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
-        y = wl_fixed_to_double(value) * scrollFactor;
+        y = -wl_fixed_to_double(value) * scrollFactor;
 
     _glfwInputScroll(window, x, y);
 }
diff --git a/src/wl_window.c b/src/wl_window.c
index e30f947f..c57b0d78 100644
--- a/src/wl_window.c
+++ b/src/wl_window.c
@@ -1096,8 +1096,10 @@ void _glfwPlatformGetFramebufferSize(_GLFWwindow* window,
                                      int* width, int* height)
 {
     _glfwPlatformGetWindowSize(window, width, height);
-    *width *= window->wl.scale;
-    *height *= window->wl.scale;
+    if (width)
+        *width *= window->wl.scale;
+    if (height)
+        *height *= window->wl.scale;
 }
 
 void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
diff --git a/src/x11_platform.h b/src/x11_platform.h
index cc61a835..ec5af01d 100644
--- a/src/x11_platform.h
+++ b/src/x11_platform.h
@@ -205,8 +205,9 @@ typedef struct _GLFWwindowX11
     // The last position the cursor was warped to by GLFW
     int             warpCursorPosX, warpCursorPosY;
 
-    // The time of the last KeyPress event
-    Time            lastKeyTime;
+    // The time of the last KeyPress event per keycode, for discarding
+    // duplicate key events generated for some keys by ibus
+    Time            keyPressTimes[256];
 
 } _GLFWwindowX11;
 
diff --git a/src/x11_window.c b/src/x11_window.c
index eeb845d1..8e815cf1 100644
--- a/src/x11_window.c
+++ b/src/x11_window.c
@@ -1275,16 +1275,20 @@ static void processEvent(XEvent *event)
 
             if (window->x11.ic)
             {
-                // HACK: Ignore duplicate key press events generated by ibus
-                //       These have the same timestamp as the original event
-                //       Corresponding release events are filtered out
-                //       implicitly by the GLFW key repeat logic
-                if (window->x11.lastKeyTime < event->xkey.time)
+                // HACK: Do not report the key press events duplicated by XIM
+                //       Duplicate key releases are filtered out implicitly by
+                //       the GLFW key repeat logic in _glfwInputKey
+                //       A timestamp per key is used to handle simultaneous keys
+                // NOTE: Always allow the first event for each key through
+                //       (the server never sends a timestamp of zero)
+                // NOTE: Timestamp difference is compared to handle wrap-around
+                Time diff = event->xkey.time - window->x11.keyPressTimes[keycode];
+                if (diff == event->xkey.time || (diff > 0 && diff < (1 << 31)))
                 {
                     if (keycode)
                         _glfwInputKey(window, key, keycode, GLFW_PRESS, mods);
 
-                    window->x11.lastKeyTime = event->xkey.time;
+                    window->x11.keyPressTimes[keycode] = event->xkey.time;
                 }
 
                 if (!filtered)
@@ -2587,13 +2591,19 @@ int _glfwPlatformWindowHovered(_GLFWwindow* window)
         int rootX, rootY, childX, childY;
         unsigned int mask;
 
-        if (!XQueryPointer(_glfw.x11.display, w,
-                           &root, &w, &rootX, &rootY, &childX, &childY, &mask))
-        {
-            return GLFW_FALSE;
-        }
+        _glfwGrabErrorHandlerX11();
 
-        if (w == window->x11.handle)
+        const Bool result = XQueryPointer(_glfw.x11.display, w,
+                                          &root, &w, &rootX, &rootY,
+                                          &childX, &childY, &mask);
+
+        _glfwReleaseErrorHandlerX11();
+
+        if (_glfw.x11.errorCode == BadWindow)
+            w = _glfw.x11.root;
+        else if (!result)
+            return GLFW_FALSE;
+        else if (w == window->x11.handle)
             return GLFW_TRUE;
     }