multiline inner loop

[M76]

How to avoid it?

 

While drawing multilines, I ran into the following problem:

 

If there is a short segment in the line, and a large change in angle thereafter, the mline will create a loop with itself. How could I get rid of it automatically?

 

I'm trying to create buffer zones around lines, and since the map function only creates rounded edge buffer zones this is the best solution I could think of.