Issue wth persistence

[AmazingAkai]

having some problem with ventoy, i installed my iso and persistence file in correct place and created the ventoy.json file inside the ventoy directory, when i boot into the flash drive and select my iso, i get two options

1: boot without persistence
2: boot with persistence

after selecting 2, when i boot into the live environment and do some changes and restart the system, my changes get reset, am i doing something wrong

i use systemctl poweroff cmd to turn it off and then turn it back on normally.