Cluster SRX4600 (node0 and node1) is not sending any logs to our Junos Space Security Director.

You might be affected by this PR:

Security log missing space between timestamp and hostname (PR1716776)
https://prsearch.juniper.net/problemreport/PR1716776

Resolved in Junos:

21.2R3-S6

21.3R3-S5

21.4R3-S4

22.1R3-S3

22.2R3-S1

22.3R2-S2

22.3R3

22.4R2

22.4R3

23.1R2

23.2R1

23.3R1