Loosing manually arranged layout after reopening dbdiagram

My table layout settings resets to default almost every time I open browser with a page with opened diagram. Sometimes refreshing the page with Ctrl+F5 helps, but if I don’t refresh it immediately, the new layout is apparently saved automatically, and then refreshing doesn’t help. Steps to reproduce:

  1. Open diagram, arrange table manually. Wait for it saves automatically.
  2. Switch to another browser tab and wait some time.
  3. Close browser
  4. Open browser, switch to bddiagram tab. On that step if I press ctrl+f5 immediately it restores my arrangement, but if I hesitate and don’t press ctrl+f5 in time, I loose my arranged layout finally