So I was at a zombie dungeon I found in the mine world and was gone get a zombie villager to cure, I got one and threw a weakness potion then "feed" it a golden apple to cure it.

I wait for about 2mins coming back to my screen and guess what, it is despawned.

It took me 15mins to get that zombie villager to spawn then I am just gone lose it, curing a zombie villager is the only way you can get villager on the server atm, without using spawn eggs that is.

Is it away to turn zombie villager despawn off ? It is annoying now that we can finally trade with them again we can't get them cause of despawning..

I had already done that in the main world and as soon as it is cured it auto despawns.
It makes sence really because if they disabled then because of unfair trading then it should despawn.

Even taking out our custom spawning/despawning mechanisms naturally in Vanilla Minecraft zombie villagers despawn when you move away from them anyway.

Yeah but that was not the case, I stood there waiting while I was "AFK" if the server did not have that custom spawning/despawning mechanism you are talking about it should not despawn cause you are within the same chunk as it, the point was to just use it that one time cause when you cure a villager you get a better trade, apparently after what I have heard.

I had already done that in the main world and as soon as it is cured it auto despawns.
It makes sence really because if they disabled then because of unfair trading then it should despawn.

It takes about 10 minutes+ for the villager zombie to cure, on the server all mobs despawn after 5mins, therefor it is not possible to cure them, can you tell me how you managed to cure one to state
"as soon as it is cured it auto despawns" how can you know it auto despawns when it gets cured when you can't cure them on the server?

Also you stated "unfair trading" the trading for the villagers has been nerfed and you can now only trade with the same villager 5 - 10 times, the trading is fine.