NBT data partly ignored in execute command

I ran the following execute command (/execute as @e[type=armor_stand,nbt=

{Rotation:[0.0f,0.0f]}

] run say hello) in a world where there was only one armorstand and its rotation was [180.0f,0.0f] and the command still executed successfully. However, when I changed the command a little bit (/execute as @e[type=armor_stand,nbt=

{Rotation:[10.0f,0.0f]}

] run say hello), it didn't execute anymore. (If you didn't notice, I changed the rotation value.) So I guess minecraft interprets the rotation value of [0.0f,0.0f] as default and didn't take it into account when executing commands. Is there anything you can do about this or do I just have to change my commands a little bit?