When me and my friends want to play multiplayer I am the server but ever since the 1.9.0 update we couldn't play most of the worlds anymore the worlds does not appear even when we restart the wifi/hotspot of my phoneor restart all of our minecraft and when it does pop out it says the world is saved on single player and when I go to the settings on the world its on then when I open the world and look at the settings its off even though i just turned it on please fix this because we cant play lan multiplayer anymore
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Thank you for your report!
We're now tracking this issue at MCPE-43626, so we will resolve and link this ticket as a duplicate.
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Verify your router is not isolating each one of you.
Do try this, especially if you have a total of 3 or more people, to each take turns trying to host to see what does, partially does, and not working at all.