Sorry that the Lightroom Classic CC is crashing and freezing frequently after the 7.3 update.
We've seen many reports of crashes from other users as well but the cause of the app crash is not common. However, we've filed in a bug and are investigating the crash reports provided by the users. I'd request you to please submit your crash report as mentioned in this article: Submit a crash report for Adobe Photoshop and Lightroom
This will help us diagnose the issue as our Engineers are looking into this problem.
i have the same issue
I have the same issue, the LR CC application hangs with the OS rotating lifesaver in view. I am running LR Classic version 7.3.1. in a Win 7 Pro 64 bit OS. I cannot send a crash report--none is generated. I checked the Adobe registry setting to be sure crash reporting was enabled--it was. So far I have not been able to identify a repeatable sequence of actions to cause the crash. The only way to terminate the application is by invoking the Task Manager and terminating it there. So far when this happens I have not lost any work but my confidence has been shaken by these recent crashes.