Seems like the problem is "known" and very old for other models, too: https://community.tp-link.com/en/home/forum/topic/97330 But still unresolved

On my AX6000 and parental controls active my kids' computers get up to 980 Mbit on a Gigabit internet connection via LAN cable.

@Kevin_Z I might have been unclear regarding details: I'm not blocking Minecraft at all - my kids are allowed to play/use it. But I don't want them to play longer than a period of time. Therefore I...

I'm missing information about how or if already open connections will be closed by parental controls! Because I see my kids playing Minecraft on Online Server for much longer than parental controls...