device not leaving config mode: Too few erase blocks

[Djfe]

Bug report

What is the problem?
logread during config mode shows:
[ 100.108766] Too few erase blocks (1)
If I press save, then it won't save but reboot into config mode without any warning whatsoever.
Users will connect wan to their home router and wonder why it doesn't show up on the map and stays offline.

What is the expected behaviour?
We could grey out the save button and display a warning message in-case this happens.
This way users can complain and we can build proper firmware in a smaller size.

Gluon Version:
gluon-v2023.2.3+

Site Configuration:
https://github.com/ffac/site/tree/v2023.2.3-4
Probably irrelevant but it causes the images being too big for the device om2p-lc in particular.
Which we can now fix, but this issue remains.

Custom patches:
https://github.com/ffac/site/tree/v2023.2.3-4/patches

[rotanid]

maybe this will be solved by #3097 ?
@blocktrron am i right or wrong?