There seems to be a divergence in the implementation regarding DisableInboundOnly and IsOutboundEnabled, which seems to indicate this is a bug.
DisableInboundOnly: in case crosschain flag is not found in the store, we fallback setting IsOutboundEnabled to true, which is permissive.
IsOutboundEnabled: in case crosschain flag is not found in the store, we fallback returning false, which is restrictive.
The proper behavior seems to be with IsOutboundEnabled, so DisableInboundOnly should probably be aligned.
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/x/observer/keeper/crosschain_flags.go#L40
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/x/observer/keeper/crosschain_flags.go#L54
