After transferring a world, it can't be played cross platform.

@@unknown - Are you saying that after converting worlds on your Switch you are unable to open them?

After converting the world, I can access it but it won't allow cross platform as it says there is content that won't allow cross platform. Only Switch players that own Bedrock are allowed.

Did you have any global resources applied on the Nintendo Switch Edition, or any other content that may have carried over the cross-platform restriction?

Does this affect all converted worlds, and have you tried creating a new world, converting it Bedrock, and testing cross-play then?

This holds true for me aswel. I have everything set to default. I'm not using other texture or resource packs. Yet, every world I transfer from the previous version of Minecraft has this problem. Newly created worlds are fine, the converted ones all have this message. This also prevents you from uploading said worlds to realms. Other Bedrock Switch players are fine to join.

At first I thought it might have had something to do with the different map system present in bedrock. So I removed all maps from my game, did not work. I tried converting it again, did not work. I think by now I have tried every setting I could come up with but it's still an issue

Could you please confirm if this affects worlds that have never had restricted content such as the Mario pack?

ie If you convert a purely vanilla world with no packs applied (global or otherwise) can you then play that cross platform on Bedrock?

Scenario 1:
My world which has had the Mario Mashup pack activated in the past (not at the moment of conversion). Converted in the past with everything set to default.
No cross play, Realms does not work
I am greeted with the following message: "Edit world? This world uses a resource pack or template that cannot be used in cross-platform multiplayer"
yet everything is set to default.

Scenario 2:
Test world 1, Newly created in the old version of minecraft, converted with everything set to default.
Cross play seems to work and I can upload this world to realms

Scenario 3:
Test world 2, Newly created in the old version of minecraft, has had mario mashup enabled in the past but not at moment of conversion
Cross play seems to work and I can upload this world to realms

Scenario 4:
Test world 3, Newly created in the old version of minecraft, has Mario mashup pack enabled at moment of conversion
Cross play and realms are disabled BUT, when I disable the mario mashup pack, cross play and realms work

Scenario 5:
My world converted using Bedrock 1.7.0 Has had mario mashup pack activated in the past but not at the moment of conversion.
No cross play, Realms does not work
I am greeted with the following message: "Edit world? This world uses a resource pack or template that cannot be used in cross-platform multiplayer"
yet everything is set to default.

Note: both Minecraft versions used are up to date at the time of testing

Thank you for your time

So it is only worlds that have had restricted content such as the Mario pack applied that cannot be used cross-platform, even if the Mario packs are removed, right?

Yes. But when a new World is created right now it seems to not care. Its only with my older converted world. The issue is still present if I convert that World again

Was the world a Mario mash-up world (template) originally?

No. It was a vanilla World. Is there any more information about my system/situation I can provide that could help you guys?

Do you happen to know how old the original world is? (We might be able to try and convert a very old Switch edition world and see if that is affected, but knowing the general age/version when it was converted might help!)

I bought the game on 22-05-2017. Knowing me I always Stay up to date and this is one of my first worlds so it should have been created roughly around that time

I have a theory on why this occurs. It might be because of certain settings you did with the world before you create it on the Minecraft switch edition game. I tested a world with custom flat settings (1x grass 30x dirt 1x bedrock) and would you know it it won't cross play over. I can tell having a Mario pack skin prior to doing this will not affect your world as my survival world transfered correctly with cross play. Yeah I think certain settings from previous game such as custom flat world will not cross play because of how the switch edition legacy console was programmed. I think this is a bug that can be fixed you would just have to program the same settings for each port of the game which is going to take a while. Yeah I don't think you can do anything to fix it yourself.