Talk me off the ledge, this is probably a bad idea...

[FLSUNNOTFUN]

I've loaded and tried Marlin 2.0.x, 1.1.9 and 1.1.6 (what it originally had) Printing from an SD card, not connected to Octoprint or anything else it starts off great, with a very level and equally distributed first layer. After about 5 - 20 minutes it just stops in place and usually does not resume but sometimes it does. It does this with all three of the firmware versions I have tried. What causes this?

If it is something in the firmware, what is it usually attributed to? My firmware code has 0 errors and uploads just fine. I'm printing at 40 mm/s, nothing to fast that would outrun a 8 bit board. It also did stuff like this before I updated the firmware.

Is this why you're not a fan of Marlin? Is there a different firmware compatible with a Makerbase MKS GEN L V1 that you recommend?

If not the firmware could this be caused by some kind of EMI emanating from the power supply, motors...etc?

UPDATE:
I'm running 2.0.5.3 now. When printing from an SD card it runs fine without stopping or pausing (yet) but if I try using OctoPrint it stops early on in the print. The only thing I did different when editing the config file this time was I did not change the string names of the printer and person who edited it. I can't imagine this having anything to do with the problem I'm having since it's just a string that gets printed in the EEPROM outputs, but it's worth mentioning. Also, I spoke a little soon on the good bed level, when I tried printing something a little bigger I noticed an uneven first layer/skirt. No matter what firmware I use (even when it came from the factory before I tried any of this) the auto-leveling does not appear to compensate in the Z direction for the surface of the bed.