Printer not resuming after a filament out pause.

[CNCModeller]

Hi,
This is the second time this has happened.

The printer pauses due to filament out of limits and then when I resume the print it moves back to the printer but then sits there.

One time when I re-paused the print and resumed again all was well. But this time it wouldn't resume.

I've disabled my filament monitor, but I'd like to find out what the issue is.

I'm using RRF 3.4 b3 albeit I have uploaded b4 but it's still showing b3 in the machine specific page.

Any thoughts would be much appreciated.
Cheers
Barry M