Problems with Winbox MAC 2.2.4 in ROS 3.23

Has anyone else had issues with using MAC connections through winbox to ROS 3.23? Winbox works fine with 3.22 and earlier versions for both MAC and IP connections. Winbox also works fine with 3.23 under IP. But when using MAC connections to 3.23, there is a lot of latency. Sometimes data does not come down to PC to populate fields. Sometimes we get router disconnect. It appears that there was some change to the MAC server. Is there a known bug?

Have already tried building systems from completely new netinstall, but it behaves the same. Reset system makes no difference.

This is happening on several PC computers running both Vista or XP.

Any ideas?

Anyone else see this problem?

works fine for me with Winbox 2.2.14 to 3.23.
I tried MAC connection to a RB500 and X86 series boards.

-Louis

The problem is intermittent. We have seen it work one time and then not on the next connection.

Have seen the same issue on Alix and RB Crossroads.

No problems with 3.22.

Is it possible that it is related to MS Windows XP or Vista updates? Firewalls are off.