In a new document, enable Edit -> Track Changes -> Record, save it as FODT, and reload.
=> Record changes is disabled.
This is fine when using ODT format.
Observed in LO 126.96.36.199.alpha0+ (8279d89d6e037def78f50c72fab2116ca56bef52), 3.3.0 / Ubuntu.
The setting is supposed to be stored in the XML as follows (taken from ODT):
This is missing from the FODT, however if this last line is added manually, the setting is imported correctly, thus it's a FILESAVE issue.
The relevant code that disables the setting seems to be here:
Added in a 2001 commit: