Launching EXEs on File Server Slow on Hyper-V Host

We have a Server 2019 Hyper-V host that hosts a Server 2008 file server (yeah, I know, too old) and other virtual machines we use as work stations that access various EXE files on the file server.

Recently, (not sure when it's started) launching EXE files stored on the 2008 server from one of the workstations (all on the same host) is getting delayed, sometimes as long as 20-30 seconds. An odd thing is that when you first log on to the work station and run the EXE it starts in what I think is a reasonable  time, until now a second launch would be a little faster, I'm assuming due to caching. But not, launching it a second time gets the delay. Other file types seem to be OK. Opening large PDFs, for instance, does not have the problem.

Working on a virtual machine hosted on our OTHER, older 2012 R2 Hyper-V host (yeah, again, I know) and going across the network, host to host, to access those same EXE files never has the delay problem.

Because of virtual machines the 2012 host not having the problem, I'm thinking there's something on the 2019 host that's been updated. Update history shows KB5052000 installed in February and KB5050182 in January. I see that the January update mentions "Remote Code Execution" but the info seems to be specific to Visual Studio so I'm not sure that would apply.

Has anyone seen this behavior or can maybe give me a clue as to where to start even looking?

Thanks,
Ken