Impossible to change the logo

I bought the theme, install it, and upload a logo. All ok,
Then I upload a new logo image, but all times looks for the first logo image uploaded (in the customize panel I can see the logo correctly uploaded, but when i see the web, there is the old logo.
The image is correct. If I put the image url in a browser I can see the image without problems. If I put the logo in the content of a page, there is no problem.

The problem is the theme is looking for the first logo image I add.
The first logo I add is "logo.png" and the new uploaded in the theme (normal and retina) is "logo-300.png".
All time is looking for "logo.png" (I can see this in the html code in browser).

So, this looks a cache issue, but I clear all cache from server, from cache plugin, unisntall cache plugin, crear Cloudflare, deactivate Cloudflare, contact to host assistence and he verify the cache is clear and this is a theme issue.

I put the url in GTMetrix and get this:

The following resources have identical contents, but are served from different URLs. Serve these resources from a consistent URL to save 1 request(s) and 3.5KiB.

https://#############.com/wp-content/uploads/2018/06/logo-300.png
https://#############.com/wp-content/uploads/2018/06/logo.png

thanks a lot