Tooltips are not displayed correctly

Hi there!

I’ve just installed and set up the Simple Travel Map Plugin and it works perfectly fine except that the tooltips are not displayed correctly. The thumbnails are too big and the location title is not centered.
This is how it looks on my blog: https://sariety.com/travel-map/

Did anyone have the same issue or knows what the problem could be?

Thanks a lot in advance!

Best,
Sarah

https://www.ads-software.com/plugins/simple-travel-map/