[Bug]: Rooted Forest: Rock of excessive earthquakes in Sticks and Stones

[STEMathematics]

SuperTux Version

supertux2 dev v0.7.0-beta.2 - 9644491 (master)

System Information

Linux Mint 22.3 - Cinnamon 64-bit

Expected Behavior

Any rock can cause at most one earthquake.

Actual Behavior

There is a rock in Sticks and Stones that causes an earthquake every time it is grabbed.

klip_1.771.367.590.084.mp4

Steps To Reproduce Actual Behavior

1. Enter the level Sticks and Stones (Rooted Forest).
2. Get to the portion of the level shown in the video above.
3. Grab the rock.
4. Release the rock when the earthquake is over.
5. Grab the rock again.

Additional Information

No response

Guidelines For Reporting Issues

• I have read https://github.com/SuperTux/supertux/blob/master/CONTRIBUTING.md#bug-reports.
• I have verified this isn't an issue that's already been reported.
• I have verified this isn't a discussion, or an issue about a crash or a feature request, but rather an actual bug ─ that is, the game did something not intended.
• I have verified this issue is not about wrong translations (use Transifex for those), or anything unsupported (e.g. third-party add-ons).
• In this report, I have only included details about one (1) bug.
• If I make a mistake while submitting this report, I agree to use the "Edit" feature to correct it, instead of closing this issue and opening a new one.