temprarily lock objects

src/playermat/Playermat.ttslua

@@ -1012,10 +1012,26 @@ function updateTexture(overrideName)
   -- apply texture
   local customInfo = self.getCustomObject()
   if customInfo.image ~= newUrl then
+    -- temporarily lock objects so they don't fall through the mat
+    local objectsToUnlock = {}
+    for _, obj in ipairs(searchAroundSelf()) do
+      if not obj.getLock() then
+        obj.setLock(true)
+        table.insert(objectsToUnlock, obj)
+      end
+    end
+
     self.script_state = onSave()
     customInfo.image = newUrl
     self.setCustomObject(customInfo)
-    self.reload()
+    local reloadedMat = self.reload()
+
+    -- unlock objects when mat is reloaded
+    Wait.condition(function()
+      for _, obj in ipairs(objectsToUnlock) do
+        obj.setLock(false)
+      end
+    end, function() return reloadedMat.loading_custom == false end)
   end
 end