PTF - Replay delay after page.prompt (PT 8.55)

During replay of a shell test calling a library test and passing 4 parameters, we experience a delay of approximately 30 sec after a page prompt (to SSR_RPOG_ENRL.SSR_STDNT_APT.GBL in CS)

The search page is showing almost instantaneously, but the Message Tool is still showing the Goto URL message for 30 sec before the values (from parameters) are filled in in the search fields and the test continues.

Neither shell or library test are using any global variables.

Transforming the library test to an ordinary test with fixed values shows the same behavior.

So it has nothing to do with passing variables or calling library tests.