I recently finished the quest ED-E my love and had his armor upgraded by the brotherhood of steel.

Since being returned, whenever i enter combat he just stands idly by as i fight enemies. On one occasion he has become completely unresponsive and frozen, causing me to reload a save.

I looked around online to see if this was common and it turns out it is. Multiple people on forums have also noticed that ED-E has similar problems after receiving upgrades from his companion quest.

Please fix this soon, Bethesda. I'd like to continue using my little robot companion again now that hes upgraded, since i dont really care for Rex.

Also, if anyone else is having this problem, please post here and talk about it.

I had this problem on my current character. Unfortunate for sure, but I just ended up using rex. With a PER or 8 (with boones beret) is fine, ED-E's sensors were somewhat overkill. Granted, he's still better in combat than Rex, especially for a ranged character, but it's no huge loss, I still got a pack brahmin to use.

Did this happen after visiting a no gun zone by any chance?

No, I got ED-E back in Primm, then fast traveled to freeside where I got attacked by some random thugs. This was the first time he just floated idly by.

A few more instances after that (1 causing me to reload a save) and I just left him at the 38. I'm hoping they fix this soon so i can start using him again.

Same here, I got him back in Primm. Left the mojave express office and he followed me. Fast traveled to the beach just south of the sunken B-29 and was surrounded by lakelurks. I noticed immediately that he wasn't playing his combat music and halfway through the fighting he wasn't attacking. I knew this bug was possible, I read about it on the wiki before I ever started this quest, so I'm not gonna complain about it, especially since I could have easily reverted to a save 5 min before and got him back. Still, I much prefer him to Rex

At least you guys got him back in Primm.

I did the Followers option for his quest and when i got back to Primm he magically transported himself into the middle of Deathclaw central above Sloan.

Besides tht he's been fine..so far.