Node generating blocks while synchronising

[has5aan]

Expected behavior

A node that is synchronizing should not generate blocks.

Actual behavior

A node that is synchronizing is generating blocks, causing conflicts in ABIClients.initStateMachine.

Steps to reproduce

Run multiple nodes, let their respective chain grow, terminate them and relaunch with fixedPeers or seedPeers configured, reaching a scenario where one of the nodes will eventually starts syncing, debug logs will log [err=Cannot read properties of undefined (reading 'moduleStore')] or Execution context {some id} already initialized.

Which version(s) does this affect? (Environment, OS, etc...)

Lisk SDK development branch.