SRX to ASA VPN

Hi

Fairly new to srx and asa!

I have an srx to asa vpn which seems to work ok until the vpn is logged out on the asa, the srx sees it as still established and so wont re-establish it till the below is run 

clear security ike security-associations
clear security ipsec security-associations

All works ok if the srx vpn is logged out, the asa re-establishes

its route based to asa policy based

can provide config if required

thanks

nick