Skills called by OnCooldownSkill have their cooldown reset even when not cast.

Summary

Skills called by OnCooldownSkill have their cooldown reset even if not cast.

Steps to reproduce

Skills:

TestMech-1:
  Cooldown: 50
  OnCooldownSkill: TestMech-2
  Skills:
    - message{message="TestMech-1"} @PIR{r=40}
TestMech-2:
  Cooldown: 30
  OnCooldownSkill: TestMech-3
  Skills:
    - message{message="TestMech-2"} @PIR{r=40}
TestMech-3:
  Cooldown: 90
  Skills:
    - message{message="TestMech-3"} @PIR{r=40}
TestMech-4:
  Skills:
    - message{message="TestMech-1 on cooldown. Time remaining <caster.skill.TestMech-1.cooldown>"} @PIR{r=40} ?skilloncooldown{skill=TestMech-1}
    - message{message="TestMech-1 not on cooldown"} @PIR{r=40} ?!skilloncooldown{skill=TestMech-1}
    - message{message="TestMech-2 on cooldown. Time remaining <caster.skill.TestMech-2.cooldown>"} @PIR{r=40} ?skilloncooldown{skill=TestMech-2}
    - message{message="TestMech-2 not on cooldown"} @PIR{r=40} ?!skilloncooldown{skill=TestMech-2}
    - message{message="TestMech-3 on cooldown. Time remaining <caster.skill.TestMech-3.cooldown>"} @PIR{r=40} ?skilloncooldown{skill=TestMech-3}
    - message{message="TestMech-3 not on cooldown"} @PIR{r=40} ?!skilloncooldown{skill=TestMech-3}

Boss:

Skills:
  - skill{s=TestMech-1} @self ~onTimer:200
  - skill{s=TestMech-4} @self ~onTimer:20

Current behavior

Every time a spell is cast using OnCooldownSkill, even if a cooldown exists for that skill, the cooldown will start anew. https://pastebin.com/JLP5aLq3

Intended correct behavior

OnCooldownSkills should not have their cooldown reset if they are not cast.

Server log file

No errors in log.

Debug log snippet

No Debug snippet.

Version: MM 4505 dev, 5.2.6 stable, 4510 dev.