haha, after over 3,000 hours, I still have that problem. I'd love a heads up alert of some kind that asks if you're sure you want to cast a concentration spell.
*
Recently, I was
wearing the Hag's masks on my characters while concentrating on Protection from Good/Evil so that the masks wouldn't take me over. Then, without thinking, I randomly had a character cast Hunter's Mark and the whole situation went south. I still managed to pull it out, which is good because I was in Honour Mode, but it really reinforced the importance of remembering which spells are concentration.
Once the Protection from Evil/Good dropped, the character was taken over by the mask. It used my consumables and dropped a fireball from a scroll on the rest of the party. Which caused more concentration loss. It was a mess, all because I was a little thoughtless.