Host notification anomaly - icinga2 reports PROBLEM when host is UP

hi
we installed a brand new icinga2 instance on ubuntu 20.04, creating our config files through icinga director.

there is a weird behaviour, that sometimes we keep getting the following notifications for many hosts:

[PROBLEM] Host mylittlehost.local is UP!

***** Host Monitoring on monit2 *****

mylittlehost.local is UP!

Info: PING OK - Packet loss = 0%, RTA = 5.88 ms

When: 2020-10-24 07:36:01 +0200
Host: mylittlehost.local
IPv4: mylittlehost.local

then after a while we get the RECOVERY for the same host

Info: PING OK - Packet loss = 0%, RTA = 111.65 ms

we use the builtin hostalive command with IPv4 with the default values: warn 3sec, crit 5sec
in the inspect part:
‘/usr/lib/nagios/plugins/check_ping’ ‘-H’ ‘mylittlehost.local’ ‘-c’ ‘5000,100%’ ‘-w’ ‘3000,80%’

do you have any idea what can be the problem?
besides this, the instance is working fine.