RNS 6.1 and 6.2 lockup on AIS connection lost

I have continued to experience a lockup of RNS becoming "unresponsive" when an AIS target connection is lost. Half the time I can click on "OK" and there is no problem. The other half the system is locked and I have to restart both RNS and the instrument task. This has persisted since Windows 7 and continues with Windows 10.

Have you received similar reports? If so is there anything that can be done?

Thanks.