Gateway Alarm is causing ipsec tunnels and other stuff to be reset/reloaded? Why?

Setup:

Two WAN Gateways inside a Gateway Group
"UMGW" configured as Tier2, it's not active since the other Tier1 gateway is active
Gateway monitoring configured with IPs 1.1.1.1 for UMGW and 8.8.4.4 for the other one
The IPSEC tunnel is configured to use the other gateay ("Interface" in general configuration of the ipsec tunnel is set to the other interface, not the one belonging to "UMGW")

In the logs I see the "UMGW" going down and then the ipsec tunnels as well as other stuff being restarted:

Jul 16 06:22:38	rc.gateway_alarm	31906	>>> Gateway alarm: UMGW (Addr:1.1.1.1 Alarm:1 RTT:23.097ms RTTsd:68.139ms Loss:22%)
Jul 16 06:22:38	check_reload_status		updating dyndns UMGW
Jul 16 06:22:38	check_reload_status		Restarting ipsec tunnels
Jul 16 06:22:38	check_reload_status		Restarting OpenVPN tunnels/interfaces
Jul 16 06:22:38	check_reload_status		Reloading filter
Jul 16 06:22:39	php-fpm	383	/rc.openvpn: MONITOR: UMGW is down, omitting from routing group GWGroup 1.1.1.1|xx.xx.xx.xx|UMGW|23.34ms|68.89ms|24%|down
Jul 16 06:22:40	php-cgi		notify_monitor.php: Message sent to xxxx@xxxxxxxx.xxx OK
Jul 16 06:22:54	php-fpm	384	/rc.newipsecdns: IPSEC: One or more IPsec tunnel endpoints has changed its IP. Refreshing.
Jul 16 06:22:54	check_reload_status		Reloading filter
Jul 16 06:23:44	rc.gateway_alarm	27207	>>> Gateway alarm: UMGW (Addr:1.1.1.1 Alarm:0 RTT:12.893ms RTTsd:1.965ms Loss:5%)
Jul 16 06:23:44	check_reload_status		updating dyndns UMGW
Jul 16 06:23:44	check_reload_status		Restarting ipsec tunnels
Jul 16 06:23:44	check_reload_status		Restarting OpenVPN tunnels/interfaces
Jul 16 06:23:44	check_reload_status		Reloading filter
Jul 16 06:23:45	php-fpm	18056	/rc.openvpn: 18056MONITOR: UMGW is available now, adding to routing group GWGroup 1.1.1.1|xx.xx.xx.xx|UMGW|12.887ms|1.949ms|3%|none
Jul 16 06:23:51	php-cgi		notify_monitor.php: Message sent to xxxx@xxxxxxxx.xxx OK
Jul 16 06:24:00	php-fpm	8881	/rc.newipsecdns: IPSEC: One or more IPsec tunnel endpoints has changed its IP. Refreshing.
Jul 16 06:24:00	check_reload_status		Reloading filter

Why would pfSense restart the ipsec tunnel when an interface the ipsec tunnel is not using goes down? Is this intended behaviour? Can this be configured somehow?

Does this also cause other outages or reset of connections? I see "reloading filter" there, what does this mean exactly, are the state tables cleared maybe?