I confirm this is a bug introduced in 1.16 update.
Entities working 24hrs prior are now unable to receive interaction when riding, rendering multiple entities in my current project usable.
After testing further it points to the rider_can_interact not functioning as the interacts work before/whilst mounting, but once riding it no longer functions. I went further to create a brand new entity with minimal functionality, and this bug is still present.
I was unable to re-produce the secondary issue of vanilla entities not accepting riders.
I confirm this is a bug introduced in 1.16 update.
Entities working 24hrs prior are now unable to receive interaction when riding, rendering multiple entities in my current project usable.
After testing further it points to the rider_can_interact not functioning as the interacts work before/whilst mounting, but once riding it no longer functions. I went further to create a brand new entity with minimal functionality, and this bug is still present.
I was unable to re-produce the secondary issue of vanilla entities not accepting riders.