HP Prime corrupting programs

[scorpio72]

I did another tests and here below my findings so far;

I have many programs installed, everything is working as it's a fresh install
I also have sokoban game installed and showing 110kb in the program list
I installed a program called SVD2.hpprgm from solvesys.zip
Once I tried to launch SVD2, I just got orange exclamation mark and nothing
then I noticed that sokoban is now 108kb and no running anymore (syntax error line 299 about RECT_P(......FFFFFF)
It means 2kb got lost
Memory RAM dropped
Tried deleting sokoban and resend it again from PC, still 108Kb and not running, many times I repeated the operation.
First reset (shift symb) didn't fix anything
Then Diag menu, "9" Reset, still nothing
So Diag menu and Format C: then "9" reset
Now, the settings are not saved anymore (font size, display light, complex numbers checkbox, date). If I turn off, restart, the settings are back to default
Again Diag menu, "9" reset, and now only the complex numbers checkbox doesn't save state after turning off or normal reset
Again Diag menu, Format C:, did full check for ROM, RAM, etc... all ok, then "9" reset, and now back to normal with settings are saved after truning off.
Reinstalled all apps and Sokoban game is back to 110Kb in size and running.

Conclusion : The program memory area is not protected and some programs could be corrupted by another programs

Please check and let me know your findings. The problem is repeatable. Need an urgent fix.