Bizarre issue with a command

[plush kettle]

Can someone explain this to me?
/execute as @e[type=armor_stand,name=Test] at @s run fill ~-15 ~-15 ~-15 ~15 ~15 ~15 air replace oak_planks
You see the command works just fine the way it is now, but change those 15s to anything higher the command will not work at all anymore. Doesn't even give an error syntax. What do I do?

[whole oracle]

Its because the limit of the area

Bedrock edition cannot render a bigger area than this

[plush kettle]

@feral crown is there a different way I can achieve the same goal as the previous command? Because if there isn't my entire project is done for

[past pond]

You can execute multiple commands instead. Each single /fill command may only fill a 31x31x31 volume.