When I open the graph view there is an “X” and a “cog” (for graph settings, filters, etc) overlapping in the upper right corner. Both overlapping buttons are active. If I move my cursor to the bottom left of the pair of buttons close works. If I move my cursor to the upper right of the pair of buttons setting cog works.
Things I have tried
I have been unable to find any reference to this issue as a bug or conflicting setting or theme issue, but I also do not know what to call the issue. I tried to replicate in sandbox and other vaults with no success.
If it’s fine in the sandbox and other vaults, that means it’s a custom theme, custom CSS, or a plugin specific to that vault. I’d try these steps and report back.