What could cause constant peer hopping between interfaces. I have Mikrotik router with Cisco switch. They are connected via trunk port. In event logs the switch (peer) is constantly changing between Bridge interface and eth 5 (interface with public ip).

Logs:

15602046	21.10.2020 13:09:22	21.10.2020 13:09:22	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface Bridge is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15601843	21.10.2020 13:04:48	21.10.2020 13:04:48	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface ether5 is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15600621	21.10.2020 12:39:16	21.10.2020 12:39:16	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface Bridge is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15600356	21.10.2020 12:34:46	21.10.2020 12:34:46	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface ether5 is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15599406	21.10.2020 12:09:04	21.10.2020 12:09:04	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface Bridge is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15599315	21.10.2020 12:04:41	21.10.2020 12:04:41	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface ether5 is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15598004	21.10.2020 11:39:01	21.10.2020 11:39:01	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface Bridge is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0
15597867	21.10.2020 11:34:38	21.10.2020 11:34:38	System	[Router] Site	Default	0	SYS_IF_PEER_CHANGED	Normal	New peer for interface ether5 is [Sw] Site - Core interface Gi1/0/24 (A4:B2:39:C3:4D:98)		0