Question on bgp bfd --unconfigure bfd at the remote-end

[Madhu-api]

R1===R2

R1 and R2 are configured with bgp + bfd

bfd and bgp sessions are up

now, unconfigure bfd from bgp in R2
i.e., do "no neighbor bfd" in R2

BGP session in R1 doesn't go down even though the associated bfd session in R1 goes down
(it went to Idle state and came up back immediately)

is this expected?

R1 config

c4c3989cc2da# show running-config
Building configuration...

Current configuration:
!
frr version 9.1-dev-my-manual-build
frr defaults traditional
hostname c4c3989cc2da
no ipv6 forwarding
!
debug bfd peer
debug bfd zebra
!
router bgp 1101
bgp log-neighbor-changes
no bgp ebgp-requires-policy
neighbor 172.18.0.3 remote-as 2202
neighbor 172.18.0.3 bfd
!
address-family ipv4 unicast
network 11.11.11.0/24
exit-address-family
exit
!
bfd
exit
!
end
c4c3989cc2da#

R2 config

971a49d8ce45# show running-config
Building configuration...

Current configuration:
!
frr version 9.1-dev-my-manual-build
frr defaults traditional
hostname 971a49d8ce45
no ipv6 forwarding
!
router bgp 2202
bgp log-neighbor-changes
no bgp ebgp-requires-policy
neighbor 172.18.0.2 remote-as 1101
neighbor 172.18.0.2 bfd
!
address-family ipv4 unicast
network 22.22.22.0/24
exit-address-family
exit
!
bfd
exit
!
end
971a49d8ce45#

c4c3989cc2da# show bfd peer
BFD Peers:
peer 172.18.0.3 local-address 172.18.0.2 vrf default interface eth0
ID: 4147245484
Remote ID: 0
Active mode
Status: down
Downtime: 6 minute(s), 56 second(s)
Diagnostics: neighbor signaled session down
Remote diagnostics: neighbor signaled session down
Peer Type: dynamic
RTT min/avg/max: 0/0/0 usec
Local timers:
Detect-multiplier: 3
Receive interval: 300ms
Transmission interval: 300ms
Echo receive interval: 50ms
Echo transmission interval: disabled
Remote timers:
Detect-multiplier: 3
Receive interval: 300ms
Transmission interval: 300ms
Echo receive interval: 50ms

c4c3989cc2da#

c4c3989cc2da# show ip bgp summary

IPv4 Unicast Summary (VRF default):
BGP router identifier 11.11.11.1, local AS number 1101 vrf-id 0
BGP table version 24
RIB entries 3, using 600 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
172.18.0.3 4 2202 407 426 24 0 0 00:08:21 1 2 N/A

Total number of neighbors 1
c4c3989cc2da#

c4c3989cc2da# show version
FRRouting 9.1-dev-my-manual-build (c4c3989cc2da) on Linux(5.4.0-166-generic).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--prefix=/usr' '--localstatedir=/var/run/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--enable-sharpd' '--enable-multipath=64' '--enable-user=frr' '--enable-group=frr' '--enable-config-rollbacks' '--enable-vty-group=frrvty' '--enable-snmp=agentx' '--enable-scripting' '--with-pkg-extra-version=-my-manual-build'
c4c3989cc2da#

[ton31337]

Enable debug bgp bfd and show the logs. Also, please show show bgp neighbors.