Do you have backup-menu installed?
And really want to know what is going on?

Just what I would do:
make a backup of rootfs and optfs, preferably on SD card
backup your MyDocs on PC
reflash completely (you may try first time only firmware, i.e. combined rootfs/optfs, but I'd suggest full flash eMMC also)
boot Maemo, let it opt (move parts from rootfs to optfs), let it settle (maybe tracker will run awhile)
and test it again.

If it still shows same weirdness, then it seems lile HW failure.
If not, I wish you good hunting (but no idea where/how to start)

Before restoring the backup, you need to install same kernel (kp52), else you will have a reboot loop.