I’ve ran v2.6 and v5.17 pps and can’t reproduce your plunge rate for feedrate problem during cutting motion. Please send me a support.zip file per Creating a Sheetcam Customer Support file
re. M0 in v5.17 pp- see line 132
ppMachinePause = “M00” – assign nil to suppress use
replace with
ppMachinePause = nil – assign nil to suppress use