Canvas Size Height Not Recorded in Actions

When I record an Action, changes made in Image > Canvas Size don’t seem to record the Height value correctly.

If I adjust the canvas manually, the difference is very small (around 0.04 mm). But when I run the Action, the error becomes much larger (about 5 mm), which doesn’t seem like normal pixel rounding.

Also, when I only change Image Size, the results are the same whether I do it manually or through an Action.

Since the Canvas Size height change doesn’t show up in the recorded Action, I think there might be a bug with how Canvas Size is being recorded in Actions.