Tip: If you place a moon, midpoint, or dragon coin through Map16, it will always respawn whenever you reenter that sublevel. It will not respawn if you add it through the Add Objects/Extended Objects window.
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Details for Portable Springboard Multiple-Frame SFX Fix
This patch fixes a somewhat not-mentioned bug with the SFX of the portable springboard. During the bouncing animation, the SFX port $1DFC is written every frame.
While this is unnoticeable, since the SFX keeps getting replaced (replayed) until the last frame of writing, it is noticeable if the game is lagging, because lag delays the time between each write to $1DFC, allowing the beginning portion of the SFX to be audible.
Fun fact: SMA2 also have this bug, and is noticeable even without lag due to how the SFX being replayed being handled differently.