The bug exists for all extensions having a "<Condition id="PhotoSelection" selection="multiple">...</Condition>" section in their addin.xml. Commenting it out and recompoiling fixes the problem (but disables the batch mode, obviously).
You can temporarily fix the bug by disabling and enabling the addin, but it will reappear within the next two restarts.
The bug exists for all extensions having a "<Condition id="PhotoSelection" selection= "multiple" >...</Condition >" section in their addin.xml. Commenting it out and recompoiling fixes the problem (but disables the batch mode, obviously).
You can temporarily fix the bug by disabling and enabling the addin, but it will reappear within the next two restarts.