Plugin WP Google Maps Conflict Stylesheet – Infowindow does not display fully

On my website (https://plannedtraveller.com) on the Google Map displayed on the home page, when the marker is clicked the infowindow which opens up is not sized correctly – hence either the top of the words is cut off or there are tiny scroll bars either vertically or horizontally or in some cases the words are jumbled together.

Not sure if it is linked but on the top right corner, the map and satellite buttons also seem compressed.
Currently using width 500px and height 100%. Tried from 300px to 900px width but the above issue continues

Tried changing theme CSS, the plugin php file as well as wpgmza_style.css but to no avail. Pl suggest where I should make changes so that the address entered displays fully and in bold like the preview window of the plugin (In the maps section the preview of info windows shows beautifully.)

I have already posted this query on the plugin support and was requested to use the WordPress 2014/2015 theme and check if the issue is present. I did the same, and the issue is not faced. Therefore, it seems it is a conflict with the Theme stylesheet.

Thanks