Thread getting cut to short

Hello, I have a Highland 1201 embroidery machine. I’ve had it working fine for a year and a half, recently I’ve had to redo the needle timing and now the machine will embroid fine but when it cuts the thread at the end of the stitch the thread hook can’t grab the thread to pull it back into the Velcro, it seems like it’s getting cut to short and it jumps out of the needle, so I have to rethread each color after each cut, very aggravating, I’m not sure what I’m doing wrong, but if anyone knows how I can correct this I would appreciate your input.