Massive Stuttering when printing via USB / UART

[wilhelmzeuschner]

Description

When I print via Octoprint, there are massive stutters which lead to ugly blobs on the print. Same GCODE via SD works fine.

Additional Information

Right: blobs via Serial, left print from SD

[wilhelmzeuschner]

This is in fact to related to the printer but rather an issue with one of the plugins I am using, maybe OctoDash.