MC: 1.16.5
Forge: 36.2.21
Mod version: LegendaryTooltips-1.16.5-1.1.6.jar
Iceberg Version: Iceberg-1.16.5-1.0.38.jar

While I'm in the controls menu and I press the shift key, the game crashes. Issue was fixed after removing Legendary Tooltips and Iceberg. Here's the log file and here's the mod list.

Thank you for the report, this has been fixed in version 1.0.41 of Iceberg .