I have already made a full report of the issue that you are talking about, with logs, a video, and repro steps. It is now up to the devs to find the cause and decide on the solution.
I am sorry that you had to experience the issue, and it is unfortunate that you lost the items on your toolbelt. The items being lost is also in my report. There is no way to get it back at this point, so all you would be able to do is replace the items you lost by grabbing them out of the cm menu.