Wrong charset is used when adding columns

[nick-potts]

When adding a column like so:

 $table->string('model_value')->nullable();

I must set the charset and collation manually so it matches the driver config like so:

$charset = config('database.connections.singlestore.charset');
$collation = config('database.connections.singlestore.collation');
$table->string('model_value')->nullable()->charset($charset)->collation($collation);

is this expected behaviour?