Hi josnyder​ ! You've found my issue. It's was the manageVars plugin. It was present in the older code and the clearVars function was being overwritten by the plugin. I've completely removed the plugins (manageVars and clearVars). And now we're good to go! Thank you for sharing this tip. I was pulling my hair on this.

Hi, I’ve been using the AA Extension 1.7.8 (Adobe Analytics - Adobe Systems v1.7.8 using AM 2.17.0), and I seem to have a resurgence of a failing Action Type: Clear Variables (which calls the s.clearVars). I’ve debugged it and the original s.clearVars(); works if taken directly from that 2.17.0 AM.js. But for some reason when it’s rendered through Launch, on execution, the function s.clearVars is replaced with an empty call like so: … see screenshot … that last one doesn’t clear any variables.I ...