Straight line crack in artexed ceiling

[Timmango]

I have tried, in vain, to cover over a straight line crack in the artex in our bathroom ceiling. I imagine this is where the plasterboard sheets have come together when attached to the joist above. I have tried putting some flexible filler in and matching the swirls but it keeps coming back.

Anyone any ideas how to fix the problem for the long term?

Thanks!

 

[roughcaster]

The only way to repair the crack properly is to tape over it, and have the ceiling plastered/skimmed. It's worth putting in some more screws along the crack too, just to make sure there's no movement along the join.