The node “Column Auto Type Cast” seems to changes it’s configuration (or simply bugs out?) after a KNIME restart, when checking for empty cells.
And yes, configurations were saved.
Node: Column Auto Type Cast
Config: Missing value pattern -> <empty>
Result after configuration: An empty cell gets replaced with missing
Result after Restart: An empty cell gets passed through
Result after Restart and reconfiguration: change the value to <none>, apply and then back to <empty> so the change takes effect -> An empty cell gets replaced with missing
Repeatable: Yes. Tested on multiple PCs
Fastest reproduction: Table Creator with 1 cell -> String Manipulator to replace it with an empty cell [string("")] -> Column Auto Type Cast