Directional Delete not working 10.3.1524

Anyone else finding that directional delete does not always work as intended in this new update?

Sometimes, instead of moving to the previous message, it moves to the next. This seems to happen when the list is down to the last few messages.

I just want to make certain it’s not just me experiencing this, and it only started happening after I did the recent April 10 update.

EDIT: Definitely not working in this new release