Software Reset and Watchdog Reset let my system crash. So far I worked in traditional 64k mode and everything worked as expected. Now I use contiguous mode and experience the crashes.
Normal program execution just works fine.
I use a 256kByte Flash where a booloader stays in page 0
page 1 was used for programs so far in normal mode by switching page 0 -> 1 with help of port pins

Now contiguous mode programs are copied into page 2+3, which gives 128k max code size programs. Trying to jump back to page 0 (bootloader) or soft restarting the application with
((void (code *)(void)) 0x0000) ();
Hangs the system. Also using the Watchdog Timer to enforce a Hardware reset ends in a system not starting up anymore.
After power down up again, everything works fine again.

Any ideas?

Thank you. Werner