perwreck eventset can't correctly support child eventset if there are 2 or more wrecks

[A2ur3]

Disclaimers

• I have searched the issue tracker to check if the issue has already been reported.
• My issue happened while using mods.

What happened?

<EventSet identifier="wrecks" chooserandom="true" perwreck="true" allowatstart="true" triggereventcooldown="false">
  <EventSet identifier="husks" chooserandom="false" triggereventcooldown="false" allowatstart="true" commonness="50">
    <MonsterEvent characterfile="Husk" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Husk" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Husk" amount="1" spawntype="wreck" />
  </EventSet>
  <EventSet identifier="crawlers" chooserandom="false" triggereventcooldown="false" allowatstart="true" commonness="30">
    <MonsterEvent characterfile="Crawler" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Crawler" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Crawler" amount="1" spawntype="wreck" />
  </EventSet>
  <EventSet identifier="mudraptors" chooserandom="false" triggereventcooldown="false" allowatstart="true" commonness="20">
    <MonsterEvent characterfile="Mudraptor_unarmored" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Mudraptor_unarmored" amount="1" spawntype="wreck" />
    <MonsterEvent characterfile="Mudraptor_unarmored" amount="1" spawntype="wreck" />
  </EventSet>
</EventSet>

3 wrecks in map
expected behavior 1: each wreck has 3 husks or 3 crawlers or 3 mudraptors
expected behavior 2: first wreck has 3 husks + 3 crawlers, second wreck has 3 mudraptors, third wreck has nothing (the parent eventset will be applied three times because there are three wrecks but no guarantee three waves monsters will be spawned in different wrecks)
actual behavior:
wreck 1 - 1 mudraptor
wreck 2 - 1 mudraptor, 2 husks
wreck 3 - 1 mudraptor, 1 husk

Reproduction steps

make level has multiple wrecks and test this eventset

Bug prevalence

Just once

Single player or multiplayer?

Single player

-

No response

Version

v1.7.7.0 (Winter Update)

-

No response

Which operating system did you encounter this bug on?

Windows

Relevant error messages and crash reports

No response

[A2ur3]

Wreck 1:

Wreck 2:

Wreck 3:

[A2ur3]

<EventSet identifier="wrecks" chooserandom="true" perwreck="true" allowatstart="true" triggereventcooldown="false">
  <MonsterEvent characterfile="Husk" amount="3" spawntype="wreck" />
  <MonsterEvent characterfile="Crawler" amount="3" spawntype="wreck" />
  <MonsterEvent characterfile="Mudraptor_unarmored" amount="3" spawntype="wreck" />
</EventSet>

This eventset works as intended
percave can't support child eventset too
perruin idk and I don't care I doubt the game is playable when over 1 ruin is generated

[A2ur3]

expected behavior 3: total 9 monsters will be spawned inside wrecks
because 3 wrecks so the parent eventset will be applied three times
so it could be 3 husk monsterevents + 3 crawler monsterevents + 3 mudraptor monsterevents
although we defined 3 husk monsterevents inside the same child eventset but that does not mean the game will spawn them inside the same wreck
so the result could be:
wreck1 - husk, husk, crawler
wreck2 - husk, crawler
wreck3 - crawler, mudraptor, mudraptor, mudraptor