[Bug]: Campaign sometimes unloaded immediately after loading.

[kwvanderlinde]

Describe the Bug

Sometimes when I open a campaign, it opens and shows a map for a moment before disappearing and being replaced with a blank campaign. No errors are shown or logged.

To Reproduce

1. Find a nice campaign in your file explorer.
2. Open the campaign from your file explorer.
3. If you're unlucky, see the campaign disappear after a moment.

Expected Behaviour

The selected campaign should remain open until I replace it.

Screenshots

No response

MapTool Info

1.14.1

Desktop

Linux Mint 21.2

Additional Context

Not all campaigns have this issue, but I don't know yet what makes the difference. Here is a test campaign of mine that consistently shows the problem for me: 4354-graaljs.cmpgn.renamed-to.zip In this campaign there is an error that comes up, but it seems to be a symptom of the campaign be unloaded rather than a problem in its own right.

I remember hitting this issue a week or so ago when opening a campaign from within MapTool instead of from the file explorer. But I tried to reproduce it now and couldn't, so I'm not sure anymore if I'm right about that.