M5 takes very long time to execute spindle off - 1.2116

[hobycreator]

M3 starts the spindle instantly, but M5 or the e-stop takes 10 seconds or more to initiate the stop signal through RS485, rolling back to 1.2115 solves issue.

[Ruslan]

I am using 1.2115 and I am controlling spindle VFD through RS485. Reaction of vfd to changing speed or fvd/rev/stop command is not fast as it must, it needs 1-3 seconds and has different duration. Is it bug?