I have the same issue with IOS and MacOS (current build):
10:04:00 ipsec processing payload: KE (not found)
10:04:00 ipsec IPsec-SA established: IP_OF_CLIENT[4500]->IP_OF_VPN_Router[4500] spi=0xa37f177
10:04:00 ipsec IPsec-SA established: IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500] spi=0xb93a775
10:04:02 ipsec ike2 request, exchange: INFORMATIONAL:97e IP_OF_A_Different_working_Connection[4500]
10:04:02 ipsec payload seen: ENC
10:04:02 ipsec processing payload: ENC
10:04:02 ipsec respond: info
10:04:03 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_CLIENT[4500]->IP_OF_VPN_Router[4500] spi=0xca8e3d2
10:04:03 ipsec adding payload: DELETE
10:04:03 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500] spi=0x73be941
10:04:03 ipsec adding payload: DELETE
10:04:03 ipsec ike2 reply, exchange: INFORMATIONAL:7 IP_OF_CLIENT[4500]
10:04:03 ipsec my msg id not matching, ignoring
10:04:04 ipsec ike2 request, exchange: INFORMATIONAL:97f IP_OF_A_Different_working_Connection[4500]
10:04:04 ipsec payload seen: ENC
10:04:04 ipsec processing payload: ENC
10:04:04 ipsec respond: info
10:04:06 ipsec ike2 request, exchange: INFORMATIONAL:980 IP_OF_A_Different_working_Connection[4500]
10:04:06 ipsec payload seen: ENC
10:04:06 ipsec processing payload: ENC
10:04:06 ipsec respond: info
10:04:08 ipsec ike2 request, exchange: INFORMATIONAL:981 IP_OF_A_Different_working_Connection[4500]
10:04:08 ipsec payload seen: ENC
10:04:08 ipsec processing payload: ENC
10:04:08 ipsec respond: info
10:04:08 ipsec retransmit
10:04:08 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_CLIENT[4500]->IP_OF_VPN_Router[4500] spi=0xa37f177
10:04:08 ipsec ike2 expire 0xb93a775
10:04:08 ipsec queued
10:04:08 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500] spi=0xb93a775
10:04:10 ipsec ike2 request, exchange: INFORMATIONAL:982 IP_OF_A_Different_working_Connection[4500]
10:04:10 ipsec payload seen: ENC
10:04:10 ipsec processing payload: ENC
10:04:10 ipsec respond: info
10:04:11 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_CLIENT[4500]->IP_OF_VPN_Router[4500] spi=0xa37f177
10:04:11 ipsec,error IPsec-SA expired before finishing rekey: IP_OF_CLIENT[4500]<->IP_OF_VPN_Router[4500] spi=0xb93a775
10:04:11 ipsec,info killing ike2 SA: IP_OF_VPN_Router[4500]-IP_OF_CLIENT[4500] spi:e4956eaededf97f6:870f419dd796c477
10:04:11 ipsec IPsec-SA killing: IP_OF_CLIENT[4500]->IP_OF_VPN_Router[4500] spi=0xa37f177
10:04:11 ipsec IPsec-SA killing: IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500] spi=0xb93a775
10:04:11 ipsec removing generated policy
10:04:11 ipsec IPsec-SA expired: ESP/Tunnel IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500] spi=0xb93a775
10:04:11 ipsec adding payload: DELETE
10:04:11 ipsec KA remove: IP_OF_VPN_Router[4500]->IP_OF_CLIENT[4500]
10:04:11 ipsec,info releasing address 10.10.100.82
10:04:11 ipsec ike2 reply, exchange: INFORMATIONAL:9 IP_OF_CLIENT[4500]
10:04:11 ipsec SPI f697dfdeae6e95e4 not registred for IP_OF_CLIENT[4500]
10:04:12 ipsec ike2 request, exchange: INFORMATIONAL:983 IP_OF_A_Different_working_Connection[4500]
/ip ipsec peer print
5 R ;;; ikev2 clients
address=0.0.0.0/0 passive=yes auth-method=rsa-signature certificate=TPGGateway254-ovpn generate-policy=port-strict policy-template-group=default exchange-mode=ike2
mode-config=ikev2-default send-initial-contact=no my-id=fqdn:sstp.ontpg.com hash-algorithm=sha256 enc-algorithm=aes-256,aes-128 dh-group=modp2048,modp1024 lifetime=1h
dpd-interval=2m
/ip ipsec policy print
T * ;;; default
group=default src-address=0.0.0.0/0 dst-address=0.0.0.0/0 protocol=all proposal=l2tp-default template=yes
/ip ipsec mode-config print
Flags: * - default
0 * name="request-only"
1 name="ikev2-default" system-dns=no static-dns=172.17.1.43,172.17.1.44 address-pool=l2tp-pool-default address-prefix-length=24
/ip ipsec mode-config print
Flags: * - default
0 * name="request-only"
1 name="ikev2-default" system-dns=no static-dns=172.17.1.43,172.17.1.44 address-pool=l2tp-pool-default address-prefix-length=24
/ip ipsec proposal print
4 name="l2tp-default" auth-algorithms=sha256,sha1 enc-algorithms=aes-256-cbc,aes-128-cbc lifetime=0s pfs-group=none