I reinstalled the OS, reinitialized all programs through the debug menu and then restored the factory patches. This time I created my own patches in user bank 1 and so far no problems.
After installing the beta firmware, I got strange names in some presets of G bank.
This is a known issue / side effect of the beta firmware and is covered in the following post :
"New Beta Main OS 1.0.0.13 - Weird Naming in new preset slots".
I've reinitialized all programs as instructed.
And no problem so far with patches stored in any user bank.
I guess the reinitialization of programs, like you have done, is a "must do" step.