@Clt49er If you are using UGS GRBL inch switch it over to UGS GRBL mm
I went through this issue back in March, and when I switched the post-processor over to
UGS GRBL mm, the problem was solved. Link to my thread below
Start from Line Moving very slow - gSender / Bug - Sienci Community Forum
*I think the last time UGS GRBL inch worked fine was on v1.4.10 or before. I canโt remember
*edited my last sentence for clarity