Not you. See, for example:
For me, though, a pop-up saying that the first one was on the house or something like it appeared after entering.
Happened to me as well during my third run, ending it after 2-2. I suspected a disconnect, then got hit by this bug:
Before that, did a couple of runs resulting in 6-2 and 5-3 with this deck by Old Guardian:
AAECAYjaBQAP9eMEseYEh/YEsvcEs/cEubEGurEGvLEG9rEGi7cG/7oGz7wG1+UG2OUG2eUGAA==
( from https://www.hearthstonetopdecks.com/what-decks-will-be-playable-in-the-great-dark-beyond-pre-release-brawl/
)
— mostly due to ‘F2P’ considerations (I only crafted those two epics, which, funnily enough, I didn’t need when playing ‘rainbow’ DK in WW) and having discenchanted (for the full value, of course) cards like Zilliax previously — maybe I’ll get it from a free deck later, who knows (I haven’t been playing in PiP, even the reward track isn’t finished for me — I think much of my progress there stopped when dailies could no longer be completed in Mercs).
Even got a legendary card (Naielle) from the first run, so I suppose it’s not bad. Of course, I could still do a few more attempts (Pre-Release Tavern Brawl: farm packs for tickets?), but I’m not sure I wanna bother.