Necro summoner revived doom knight stayed with me over an hour

Is this a normal bug? I am on xbox playing my first character, so I'm just learning. I am working on finishing act V Hell for the first time kind of new. I got on and decided to run diablo before continuing on from

Glacial Trail. I had revives and summons then merc got dropped, so I tp out to res him and back. Finished D and tp out and jumped to Hargoth. All my revives started dropping like usual, while I'm messing around with inventory, stash, etc. then I jump to Glacial and realize I still have 1

Revive following and fighting. I cleared my way through all the underground, Tundra, Summit and to the keep before I quit the game. That lone DK was still there like he thought he was a skellie. I don't know how or why. It'd be amazing if that's how

Revive was designed to work, but sadly not. Except for that lone DK that just didn't want to quit.

Of course, when I logged on the next time, he was gone just like the skellies.

It wouldnt surprise me if they introduced new bug(s) with the recent updates. So much has been added and changed lately.

I thought

Revive is meant to stay only like an hour? I dont know, never use them when playing summoner. But havent used summoners much in d2r.

Revives have a lifespan of 180 seconds.... usually