Hello,
You can bypass Flow daemon for UDP traffic using the below KB article with the help of Firewall filters.
https://kb.juniper.net/InfoCenter/index?page=content&id=KB26757
However please be informed that the above KB article is only valid for SRX branch series devices as selective packet mode is only possible on them and not on High End SRX devices.
https://kb.juniper.net/InfoCenter/index?page=content&id=KB17263
Hence on High End Devices the only poassible way is to completely change the SRX in packet mode as mentioned in the below KB article:-
https://kb.juniper.net/InfoCenter/index?page=content&id=KB30461
Thanks,
Pulkit Bhandari
Please mark my response as Solution Accepted if it Helps, Kudos are Appreciated too. 