If you have the following selection
Base Info ValueAsText
Security Basic 128Rsa15 or Security Basic 256Sha256
View Services

and one of the Security Basic CUs is skipped, because the server
does not have the right security profile.

Then the View Services become extremely slow and fail because session breaks.

The problem is in part that Security Basic initialize.js is executed,
but the cleanup.js is not executed.
the initialize.js contains this:

// we NEED a secure channel 128Rsa15 for this CU!
if( epSecureEncrypt === null && epSecureSign === null ) {
addSkipped( "Secure endpoint using 128Rsa15 not found!" );
stopCurrentUnit();
}

Test.PostTestFunctions.push( postTestDelay );

function postTestDelay() {
UaDateTime.CountDown( { Seconds: 6, Message: "before invoking next script..." } )
}

while cleanup.js contains this (but is not executed):

Test.PostTestFunctions = [];

Workarounds:
1) Do not execute Base Info ValueAsText
2) Execute additionally Subscription Base/001.js

it is clear how 2) works, because it always executes it's cleanup.js

it is not clear to us how 1) works.