Hello @jbjzq
Thank you for trying out my plugin. Means a lot.
I am guessing that you are on the Gutenberg editor? If so, this is a known limitation as of now.
To give you more details, previously we relied on the media_send_to_editor filter to modify markup but that isn’t fully compatible with Gutenberg just yet. I tried to come up with a workaround for this, but none were elegant.
There are couple of open issues related to the same in the Gutenberg repository, I am following them.
– https://github.com/WordPress/gutenberg/issues/8472
– https://github.com/WordPress/gutenberg/issues/10204
I will update the plugin as soon as I can find a reasonably good solution. Don’t have a solution just yet.