I have an execute command summoning 2 armorstands. The first armorstand is fine, but the second won't respond to commands, but sometimes it works if I relog. Also, I can't summon more than 2 armorstands regularly, or none will respond to any commands.

They were both supposed to be teleported several times, to another mob.

Instead, only one was teleported, and only one could be destroyed with /kill
Steps to Reproduce:
1. Summon multiple armor stands, that are invisible, and holding an item, invulnerable, and noGravity. Also make them small
2. Make a fill clock teleporting them constantly
3. You should notice that only one reacts. If not, add more armorstands.