Bug - Prusa Connect w/ XL - Cancel Object Fails Error 422 w/ large number of objects  

Bug - Prusa Connect w/ XL - Cancel Object Fails Error 422 w/ large number of objects

PrusaConnect - Current Version

Printer type - XL - 5 Head

Printer UUID - 8f54f7ba-2550-4658-865d-0e6abbc44f6d

Printer firmware version - 6.1.3+7898

PrusaSlicer version - 2.9.0

Description of the bug, including steps to reproduce (if possible):

Cancel object is a critical function to me, I am a manufacturer, I fill the plate every print, every time with a large number of small objects (up to 500).  When an individual object fails I must have the ability to cancel it so the entire, multi-day print does not fail.

Bug: can’t seem to cancel objects consistently, seems like the larger number objects will not allowed me to cancel and  some of the smaller number objects still allow cancellation.  The error I received through Prusa connect is “HTTP error 422 - command was rejected by the printer” see screenshot below.  In the screenshot I tried to cancel 422 and got the error, however, if I tried to cancel object 200 the cancellation goes through normally.  I’m not sure if it is a number limitation, or if it is a part:plate orientation related issue but I really need this fixed ASAP.  I was able to replicate the issue after cycling power to the printer with the same job.

While you're at it would make a lot of sense if the  object cancellation GUI  was at the top of the screen, above the list of the objects, not randomly three quarters of the way down the list.   obviously this GUI is the only efficient way to identify the part needing to be canceled with a high number of objects on the bed and will be used each and every time a cancellation is needed.

 thank you for the great work  on everything you have done with the XL!