Observed Results:

Current effective command

/execute @e[type=armor_stand] ~ ~ ~ fill ~-50 0 ~ ~50 3 ~ air

And the range where the command works is about 10 blocks.

Expected Results:
Command that worked in the version 1.18.31

/execute @e[type=armor_stand] ~ ~ ~ fill ~-250 0 ~ ~250 3 ~ air

And the range where the command works was about 200 blocks.