Not showing dropdown's in data source

Example from my POV: I see a relation column, I click edit so I can see where it’s relating to. The name is long, so I hover over it however it doesn’t show me the name, so I click the dropdown. I see Transactions table is ticked, so I go hover over it to show me all the columns to see which column it’s pulling from, and it does not show me the columns. I can wait for 5 min, I can click on it, nothing happens. After refreshing the page it works, and I can see data when I hover again. I’ll check 1 or 2 more columns, and then suddenly get the error again and have to refresh. Has anyone else encountered this or know what might be causing the problem?

Can you record a video of the problem?