Print hangs forever
We had reports about prints hanging at start. Reason is that we send M75 to show the print timer and it might happen that the next command will not send an ok as response causing the hang. The solution is to never send M75, so you need to add a replacement. Go to Printer Settings G-Codes Replacements and add a replacement with comment Remove M75 and as Regular Expression
^M75$, leave G-Code to Execute empty and save configuration. Now all M75 get removed preventing the problem.