BGP to Juniper J6350

BGP session between ISP and J6350
After some time I start received  syslog messages like:
Apr 20 14:14:32  R1 rpd[1210]: bgp_read_v4_update:9697: NOTIFICATION sent to 10.43.0.111 (Internal AS 65432): code 3 (Update Message Error) subcode 1 (invalid attribute list)
Apr 20 14:14:32  R1 rpd[1210]: RPD_BGP_NEIGHBOR_STATE_CHANGED: BGP peer 10.43.0.111 (Internal AS 65432) changed state from Established to Idle (event RecvUpdate)

Juniper is unable to handle some kind  of BGP update packets and restart session. Workaround (by colleague advice) was to apply some metric on out direction (from ISP point of view)
So after ISP apply something like:

show configuration | display set | match adv.to-r1
set protocols bgp group br1 neighbor 10.43.0.99 export adv.to-r1
set policy-options policy-statement adv.to-r1 then metric 1000
set policy-options policy-statement adv.to-r1 then next-hop self (accept/next policy/etc)

BGP flaps are gone and everythingworks as expected