Originally Posted by
GEMRM
It sounds to me like the thread cutter leaves too short a thread, and that's why this happens. On some machines the length can be adjusted by the dealer
On my Brother, I don't need to have it adjusted by the dealer, I can adjust it myself by changing the number of holes the thread goes through on the three-holed thread guide. This is a bar located directly over the tension discs, it has 3 holes. If your thread is being cut too short, reduce the number of holes you're putting the thread through to two or even one hole.
Tricialt, I would hold the thread tails as you take the first 2-3 stitches, this should solve your problem.