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Long pauses resulting in heat creep

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My 3D45 seems to pause during prints, I've tested the gcode on my Ender 3 and there is no pause, so these stops are specific to 3D45. In general this isn't a problem when I'm printing with PLA and ABS, however when using any brand of PETG this long pause combined with 250+ temperature causes the filament to expand.. then when it resumes the rest of the print is completely underextruded. I can't even change filament because there is such a big clog in the nozzle. This is happening every print above 240, but there is no issue whenever I have a very small print and no long pause occurs.

Anybody else experiencing this? I'm about to revert to the previous firmware to see if that resolves the pausing.

There was a post on reddit that explained the same thing (I had pauses too).

Basically they sent the person a new PCB board (the green one in the hot end assembly, under the cover).

Me personally, I had long pauses printing at anything over 80mm. Once I slower it down to 50, no more pauses.