I do not have much to add except for an observation I made while I was becoming more proficient with stropping. I noticed that as my stropping became more fluent it seemed as though I inadvertently added more pressure and when changing direction I seemed to bang the blade quite heavily on the strop. This was all that was needed to set the blade up for a pretty poor shave. Luckily, it was pretty easy to undo by slowing down and paying more attention to flipping the blade over carefully. Perhaps this is what happened to you Ironstubble.
"Nothing would be done at all, if a man waited till he could do it so well, that no one could find fault with it." John Henry Newman