My friend try to make a end portal în creativ and not working at ME has work. Its a bug.

I'm not a mod but I do know you need to give enough details for the bug to be reproduced by the developers so they have an easier time finding the cause of the issue. Although this might be a bug, I reckon it's more of a misunderstanding of how portals work on your side. You might want to look at the wiki to find why the portals aren't connected before assuming it's a bug.

If the world is generated using the Default (not sure about Old), you have to look for the End Portal using Eyes of Ender.
If you are in a Flat world, make sure all the portal blocks are facing inwards, like the screenshot I uploaded.

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