Possible bug: Has anybody found a tactical map that has no escape route?

You can escape from any of them? I thought you needed a spell to do that.

I've never seen that particular tactical map before.  Is it from a quest?  Or are you playing a player made map?

LoL and no wonder you want to flee!

I've had it happen a few times.  Note that Units by themselves aren't allowed to retreat.  Only when they are stacked with Heroes and Sovereigns. 

Also, one time my Sov left before some other units, and they ended up getting cornered/waxed off because they weren't allowed to leave the map at that point.  That was a few patches ago, dunno if that still applies.

I remember in one fight the other side unit moved to the edge of an area and escaped. That was the first time I know you could do that.

Then later I tried it with my champion that managed to attack 12 spiders by himself due to my misclick (and games clunky interface) but when I got to the edge of the screen I could not.

Exit boxes need to be better delineated.  Even when present, it seems to be hit or miss many times.  The "glowing boxes" are NOT always a reliable exit.

I also experienced one map where the exit was offset from the side by one square, but I've never seen one without

That would explain why I could not escape, I could not tell an escape square from a normal square.

This game needs so much polishing it is not even funny. Unfortunately I was now spoiled by Starcraft 2 and its level of detail and polish

I've seen a forest winter map, not the one OP posted, where I could go behind the escape squares. The escape squares were one step "closer" to the middle than the square the furthest away.

THAT'S what I was trying to say.  I haven't had enough coffee yet today. 

I've been in several tac screens where the white boxs would not let me escape.  These were all 1.09e or earlier.