Lightburn doesn't know when Ruida is full

My laser (with a Ruida RDC644XG controller) seems to have a limit of 99 files.

When it’s full, if I send a file over the network from Lightburn, Lightburn thinks it has succeeded but the file is not present on the laser, and when I press the go button it just cuts the previous job.

(1) Is this fixable ? Feels like it might be a bug.

(2) Is there something smarter I might do about it than periodically deleting lots of files from the laser ?

Thanks!
Richard