Disconnection causing immediate concession without an opportunity to reconnect
Disconnecting momentarily is causing me to instantly lose games. Normally when I disconnect I can restart the client and reconnect before the game times me out. At the moment, however, my normal laptop is out of commission due to a fan failure and I'm playing on a remarkably old ASUS machine. That machine is a couple of wi-fi standards behind, which means it's abysmally slow without a hardwire. However, its ethernet port is also loose because it's an old, battered machine, and if I shift slightly there's a chance of the cord disconnecting. All of that's relevant because while normally when I have a wi-fi failure I can reconnect, but when this happens and I reconnect it kicks me back to the homescreen with no evidence there was ever a game at all and no way to get back into it. This has happened twice, once in standard and once during a draft. In the draft, it initially didn't show a loss (I was at 0) but after playing the next game it was registered as a loss (I went from 0 to 2), which means this is effectively causing a concession when it should be allowing me to reconnect to the match.
This won't affect me specifically any further because I have learned to simply not play arena with the cable, and I'm not expecting compensation because the disconnect was on my end, but any bug capable of forcing a game loss demands immediate attention.
Unfortunately I can't think of a way to test this any further without negatively affecting other arena players (I have no way of knowing what this looks like on my opponent's end, but I think it's a reasonable assumption that they're staring at my timer burning down while I get kicked back to the home page) so I can't provide any further information.