In the "Show Config" page of the OneClick WebApp, there is a "Recorder Settings" path given (end of the page):
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" ./file:/${SPECROOT}/webtomcat/tmp/external/ "
We removed the ./ in front and the / after "file:".
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We are not sure how this was changed, but the correct setting is:
" file:${SPECROOT}/webtomcat/tmp/external/ "
Now the sessions were showing correct.