EX4200 high rpd process allocation with rsvp and mpls

Hello readers,
When rsvp and mpls are added to port configuration rpd process allocate much more memory then expexted and in time it would use all remaining memory and freeze the box. 

Without rsvp and mpls: 
xyz@fmPCi-bb-jsw01> show system processes extensive 
last pid: 61749; load averages: 0.34, 0.31, 0.26 up 253+20:20:30 09:58:34 
130 processes: 4 running, 104 sleeping, 1 zombie, 21 waiting 

Mem: 513M Active, 62M Inact, 103M Wired, 226M Cache, 109M Buf, 73M Free 
Swap: 


PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 
10 root 1 155 52 0K 16K RUN 4292.3 66.26% idle 
1196 root 1 48 0 95464K 14672K RUN 419.5H 6.01% chassism 
61744 remote 1 40 0 47264K 37012K select 0:01 5.62% cli 
61727 root 1 8 0 12036K 6292K nanslp 0:05 4.79% cscript 
1199 root 1 8 0 87392K 28016K nanslp 339.9H 2.29% pfem 
61741 root 1 40 0 8928K 3780K select 0:00 1.62% sshd 
61728 root 1 43 0 39108K 21348K select 0:02 0.93% mgd 
1261 root 1 42 0 29724K 22296K select 75.7H 0.93% snmpd 
1262 root 1 40 0 36476K 18512K select 89.7H 0.63% mib2d 
1197 root 2 -52 -52 73144K 18100K select 135.5H 0.10% sfid 
895 root 1 40 0 16320K 9408K select 533:07 0.05% eventd 
1269 root 1 40 0 19784K 11968K select 57.1H 0.00% ppmd 
11 root 1 -36 -139 0K 16K RUN 34.8H 0.00% swi7: clock 
1265 root 1 40 0 56504K 24528K select 33.1H 0.00% pfed 
23 root 1 -68 -171 0K 16K WAIT 27.2H 0.00% irq43: i2c0 i2c1 
1263 root 1 4 0 93440K 34228K kqread 22.8H 0.00% rpd —> allocation OK. 

With rsvp and mpls: 
xyz@fmPCi-bb-jsw01> show system processes extensive 
last pid: 61865; load averages: 0.35, 0.35, 0.29 up 253+20:25:02 10:03:06 
129 processes: 4 running, 104 sleeping, 21 waiting 

Mem: 531M Active, 64M Inact, 104M Wired, 226M Cache, 109M Buf, 53M Free 
Swap: 


PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 
10 root 1 155 52 0K 16K RUN 4292.4 67.04% idle 
1196 root 1 48 0 95464K 14684K RUN 419.5H 5.91% chassism 
61824 root 1 8 0 11968K 6224K nanslp 0:04 3.43% cscript 
1199 root 1 8 0 87392K 28032K nanslp 339.9H 1.86% pfem 
1263 root 1 4 0 115M 55100K kqread 22.8H 0.93% rpd —> much more allocated memory 


Commands used: 
rsvp { 
interface xe-0/1/0.0; 
} 
mpls { 
interface xe-0/1/0.0; 
} 

We are running two EX4200 together on Junos  15.1R6-S4 as we tried to upgrade from 15.1R6.7 where we had same issue.

Any idea what is going on? Problem with RAM allocation would lead to box freeze and physical restart is needed.