Something I noticed recently in
https://hub.spigotmc.org/javadocs/spigot/org/bukkit/World.Spigot.html#strikeLightning(org.bukkit.Location,boolean)
and
https://hub.spigotmc.org/javadocs/spigot/org/bukkit/World.Spigot.html#strikeLightningEffect(org.bukkit.Location,boolean)

The boolean for isSilent actually does nothing.
Looking at the code, I see the param isn't even used.
Im assuming in the past it was used, and now Minecraft no longer supports it (based on a Quick Look at MC code)

My suggestion is to update the docs to state that option is deprecated and/or does nothing