Twice this evening the game has Auto-Conceded on me (one on my opponents turn, and once on my turn)

1)Both interactions were mid-trigger abilities hitting the stack
2)There was no delay in play (no rope burndown)
3) There was a lot of interaction and ability triggers
4) both matches had board states which were heavily in my favor (the first one was 2 triggers away from a direct damage to my opponent who was on 1 life)

could you advise what will happen with this, as it is really disrupting my ability to have a fair game

(I've omitted the logs, as on the first attempt to post it timed out - i assume due to the log file being 37MB)