blaze spawners not generating?

so i was playing on my aternos server with a friend, we went to the nether fortress for our first time in that world. then, after finding the room where blaze spawners supposed to generate, they didnt. there were no blaze spawners. at first i thought that it was a glitch, but after restarting the server they still didnt generate. i decided to check that fortress in singleplayer and spawners generated. why? other mob spawners generated in the overworld, but not in the nether. we entered the fortress for the first time and both got achievements so none of us could break the spawners. sorry if my english is bad.

Roman, plugins are oneplayersleep (https://aternos.org/addons/a/spigot/31585), theres no mods, the server is on hardcore. idk about the hardware

Quote from Roman

Provide more information about your server.

software,plugins,mods etc.

Quote from Roman

What is the address of the server in question?

rekto5.aternos.me

Quote from Roman

I just checked some fortresses in the nether and was able to find blaze spawners without any issue.

Two possible reasons for your observations:

- The location where you think there should be a spawner is not an actual blaze spawner location

- Another player on your server destroyed them

thanks. but in some places spawners dont spawn, idk why. heres the comparsion between the server and singleplayer. where there is no spawner, its the server (https://imgur.com/a/WJDwSb6). where there is, its singleplayer (https://imgur.com/a/Kednvqn). me and my friend couldnt break the spawners because we both got achievements after we entered the fortress and there were no spawners after we entered it.