Sorry if this has been addressed, but I couldn't find any other reports.
I'm in the process of moving from HS2 to HS3. I've installed the ECM plug-in and connected my ECM-1240. All appears to be working.

But, when I make a change to the 'Channels' tab - renaming channels mostly - the plug-in becomes unresponsive after I click on the Save icon. It can take many minutes before I can access the plug-in again. There is a javascript call function displayed in the lower left of the screen.

Task manager indicates very low CPU load from any source during this time. HS3 continues to operate normally otherwise, but the ECM devices already created appear not to update while the plug-in is inaccessible.

Is this expected? Is there something I should check or test? I'm using Chrome browser.