2014r1.1 losing methods in IDE

In a project that I am working on in 2014r1.1 - I have now had two occurrences of the same worrisome kind: Run methods lost of Threads in the IDE. The application continues to work (i.e. the code is there and being executed, but I can’t edit it). To solve this I have to do a search for known text in the Run method, copy and paste the code to a newly created Thread object on the Window and keeping fingers crossed this won’t happen again.
I also got another case where the Constructor of an object want away, luckily I hadn’t saved the project and could revert and it was back.
Notice the missing arrow in the Project Navigator:

I have been holding off from Xojo and stuck to 2012r2.1 and thought that the tires were kicked on Xojo by now, but, alas - I was wrong.
This is on Windows 7 SP1 64-bit and Xojo 2014r1.1.

I definitely have not seen this. Plenty of other wacky behavior but not this.

FWIW: I have now re-saved the project as a xojo_binary_project and rebooted the machine. The file was an rbp-file originally. Hope I won’t see more code magically getting lost…

OK, a full day without any problems like this. Should we blame it on the rbp-format perhaps…?