Guider II stalls at M400 during local printing

[Ben3141592]

Uploading to SD works and prints fine, the other controls for the printer seem functional and communication seems to work fine in the terminal during those prints. Trying to print anything locally through OctoPrint starts by sending M400 and then stalling out when there's no response. I have tried increasing all of the timeouts.

[Ben3141592]

After some additional testing I found this only happens with files generated by FlashPrint and not those generated by Cura. I haven't been able to get Cura files to print correctly through local upload yet either though, there seems to be some other unrelated problem going on there.