I found another bug:
Modyfikacja Stormwall (1.4.5) spowodowała niemożliwy do naprawienia błąd.
Proszę, zgłoś ten błąd autorowi tej modyfikacji.

Error while running event Stormwall::on_robot_mined_entity (ID 66)
Stormwall/control.lua:502: attempt to index field '?' (a nil value)
stack traceback:
Stormwall/control.lua:502: in function <Stormwall/control.lua:468>

The error occurred when robots were deconstructing a section of the wall containing the emitter and stormwall tiles.
After loading the save, the error occurred again at the same moment.
I have tried several times and the error only occurs when trying to uninstall the stormwall emitter, either manually or with robots.

This is probably a consequence of "data corruption" due to the same reason the first crash happened (the one in 1.4.1).
1.4.6 fixes that issue, and includes a script to restore the data structure.

I think there is still another issue though...

This certain other issue is fixed in 1.4.7.
I really hope this was the last problem. Anything else pops up, I might have to consider rewriting the whole mod...