As shown in the video, the modification of the corner radius for a single point is disabled for rectangle shapes. This bug is not systematic but happens most of the time. Maybe am I not using the software well as I am new to it.
Thanks for any help.
Hi there @Luvnael and welcome to the forum!
Thank you for logging this matter - it is a known issue that the team will be investigating soon!
Once I have any updates to offer I’ll be sure to notify you via this thread 
Cheers,
Helen