A power produces 'ghost blocks'

[ts4bot]

When an over lv.20 elite mob uses its 'exploding' power (idk its specific name), the blocks around it disappear and restore after a while. However, some sticky pistons, which were constantly extending and retracting, stop working after its restoration, and players cannot place blocks right in front of them. It's acting like a transparent air-like block blocking the piston head from extending.

One possible solution is using '/fill air' to replace those 'ghost blocks' with air, but it is not accessible for non-op players.

This bug is found in version 8.2.4.

English isn't my mother tongue, and I'm sorry if I made mistakes.

[MagmaGuy]

Does the issue persist if players log off and log back on?

[ts4bot]

Does the issue persist if players log off and log back on?

Yes, even after the server restarts.

[MagmaGuy]

Does breaking the piston fix it?

[ts4bot]

Does breaking the piston fix it?

No. Have tried various ways but find only '/fill air' works so far.