TypeORM UpdateDate column bug

UpdateDate fails to update if a transformer is being used on the column. To reproduce:

In one terminal:

yarn docker:up --force-recreate -V

In another:

$ yarn install
$ yarn bug-two

We can see the following output:

[Case 1]: Normal Baseline (should work)
Saving createdAt:   undefined 
Saving updatedAt:   undefined 
Saved createdAt:    2020-12-03T20:20:38.694Z
Saved updatedAt:    2020-12-03T20:20:38.694Z
Updated createdAt:  2020-12-03T20:20:38.694Z
Updated updatedAt:  2020-12-03T20:20:39.763Z

[Case 2]: With Transformer (fails)
Saving createdAt:   undefined 
Saving updatedAt:   undefined 
Saved createdAt:    1607026839756
Saved updatedAt:    1607026839756
Updated createdAt:  1607026839756
Updated updatedAt:  1607026839756

It appears as though using the transformer option results in typeorm not updating the updatedAt column for us. We'd expect to see the updated updatedAt be a second later.