VRRP object tracking in non-default VRF

I am trying to configure a VRRP instance in a non-default VRF that tracks the status of an interface on a Dell S5232F (OS10 version 10.5.4.5). The configuration is as follows:

Switch A:

interface vlan199
 no shutdown
 ip vrf forwarding blue
 ip address 10.10.10.251/29
 !
 vrrp-group 2
  priority 150
  track 201 priority-cost 100
  virtual-address 10.10.10.249
  advertise-interval secs 5
!
track 201
 interface ethernet1/1/34 line-protocol

Switch B: 

interface vlan 199
 no shutdown
 ip vrf forwarding blue
 ip address 10.10.10.250/29
 !
 vrrp-group 2
  priority 200
  track 201 priority-cost 100
  virtual-address 10.10.10.249
  advertise-interval secs 5
!
track 201
 interface ethernet1/1/34 line-protocol​

In this setup Switch B is the primary and Switch A the secondary. When the tracked object is down on the primary switch, the virtual IP should be moved to the secondary. However, the tracking part does not seem to be working. Here is the VRRP status from the two switches.

Switch A:

SwitchA# show vrrp vrf blue 2
 
Interface       : vlan199                   IPv4 VRID            : 2                                       
Version         : 2                         State                : backup-state                            
Primary IP      : 10.10.10.249              Master IP            : 10.10.10.250                         
Virtual MAC     : 00:00:5e:00:01:02         Accept Mode          : true                                    
Admin Priority  : 150                       Operational Priority : 150                                     
Advertise Interval(in secs)   : 5
Preempt Status  : true                      Hold Time            : 0
Virtual IP address : 
10.10.10.249
master-transitions        : 5               advertise-rcvd            : 14469                         
advertise-interval-errors : 0               ip-ttl-errors             : 0
priority-zero-pkts-rcvd   : 0               priority-zero-pkts-sent   : 1
invalid-type-pkts-rcvd    : 0               address-list-errors       : 0
pkt-length-errors         : 0
omit-skew-time : no
Tracking states for resource Ids:
201 - Up Interface, ethernet1/1/34, priority-cost 100

Switch B:

SwitchB# show vrrp vrf blue 2
 
Interface       : vlan199                   IPv4 VRID            : 2                                       
Version         : 2                         State                : master-state                            
Primary IP      : 10.10.10.249              Master IP            : 10.10.10.250                         
Virtual MAC     : 00:00:5e:00:01:02         Accept Mode          : true                                    
Admin Priority  : 200                       Operational Priority : 200                                     
Advertise Interval(in secs)   : 5
Preempt Status  : true                      Hold Time            : 0
Virtual IP address : 
10.10.10.249
master-transitions        : 1               advertise-rcvd            : 3                             
advertise-interval-errors : 0               ip-ttl-errors             : 0
priority-zero-pkts-rcvd   : 0               priority-zero-pkts-sent   : 0
invalid-type-pkts-rcvd    : 0               address-list-errors       : 0
pkt-length-errors         : 0
omit-skew-time : no
Tracking states for resource Ids:
201 - Down Interface, ethernet1/1/34, priority-cost 100

On Switch B the tracked interface is down, so the cost should be subtracted from the priority and the "Operational Priority" should be 100, which should force a new master election, but I cannot get this to work.

I tried making the same setup with a vlan in the default VRF and in that case everything seems to be working perfectly. Am I missing something or is this a bug?