Hi there!
WP Offload Media Support Team here, Thanks for reaching out with your query we would be happy to assist
Looks like you also created a ticket using the support form. My colleague responded on that ticket but will still resend her reply below:
Most compatibility issues arise when WP Offload Media is configured to remove files from the server after uploading to the bucket. Many types of plugins require access to the local file.
The most likely reason for the issue is that “Simple Local Avatars” is not using the WordPress hooks that WP Offload Media requires to rewrite the URLs –
If that is the case, it might be best to contact their support team about this issue, to see if they can find a workaround. You may point them to our documentation about filtering URLs.
If you have any further questions, concerns, please refer to your existing ticket instead as you are a pro customer.
Thank you!