Different perfdata at same time

Describe the bug

I noticed that in the output of PerfdataWriter I sometimes have two different perfdata-values for the same host at the same second:

DATATYPE::HOSTPERFDATA	TIMET::1655526958	HOSTNAME::DC	HOSTPERFDATA::rta=0.160ms;1000.000;2000.000;0; pl=0%;25;45;; rtmax=0.287ms;;;; rtmin=0.122ms;;;;	HOSTCHECKCOMMAND::icmp	HOSTSTATE::UP	HOSTSTATETYPE::HARD
DATATYPE::HOSTPERFDATA	TIMET::1655526958	HOSTNAME::DC	HOSTPERFDATA::rta=0.153ms;1000.000;2000.000;0; pl=0%;25;45;; rtmax=0.211ms;;;; rtmin=0.113ms;;;;	HOSTCHECKCOMMAND::icmp	HOSTSTATE::UP	HOSTSTATETYPE::HARD

How can this happen?
These checks are supposed to run once a minute...

To Reproduce

I dont know how to trigger it.
It happens sometimes, but apparently only with host-checks (so far).

Expected behavior

Output perfdata only as often as the check runs.

Your Environment

• Version used (icinga2 --version): 2.13.3-1
• Operating System and version: Ubuntu 22.04
• Enabled features (icinga2 feature list): api checker ido-mysql mainlog notification perfdata

Start by tracing PerfdataWriter and the host-check scheduling path, using the two HOSTPERFDATA records and the Icinga 2.13.3 environment as the reproduction context. Determine why a host can emit different perfdata at the same timestamp; done means the output is emitted only as often as the check runs, with a regression test covering the behavior.