Got the same issue and its basically crippled my system, I have just undertaken my annual primary system's full system reload (From Windows 11, to Windows 10 21H2), and now after installing EIS (on 15.0.18.0) no firewall prompts are displayed on interactive mode and no internet access at all with it on automatic...
I've had to remove EIS entirely to post this, so I have two possible conclusions;
1) EIS 15.0.18.0 and Win 10 21H2 have some sort of compatability issue.
2) Eset dropped the ball on this release causing this issue.
I'm leaning towards 1) on the following basis;
System 2: Win 11, 21H2 - EIS 15.0.18.0 is working fine.
System 3: Win 10, 21H1 - EIS 15.0.18.0 is also working fine.
I'm going to give it a few days while I run a trial for another solution on the effected box and hope a fix is released...