Banana bread edges are burnt, top and middle is underdone
The usual remedy for something both burned and undercooked is lower heat, longer cooking time - it lets the temperature equalize a bit more, so it cooks more evenly.  You might try 300F for your usual 1:20 cooking time, and see if it doesn't burn and/or needs more time.

Alternatively, since the overcooking is directional (from the bottom) you can move the rack up, so its closer to the top, or else put something underneath to partially block the heat - like having a sheet a rack below your bread, to hopefully provide a baffle to radiant heat and let the indirect heat spread a bit more evenly.

I would also recommend, as moscajf suggested, checking your oven temperature, and/or checking other recipes in the glass pan to see if there's similar issues, in case one of them is the culprit.