Switch pattern on start position when the sequencer is playing

I have a strange problem with op-z, but can’t found the answer. I’m afraid isn’t there a bug?

I have a project with some patterns with different length: pattern 1 has 16 steps length and pattern 2 has 64 steps. The pattern 1 is intro, so I play it just 2 times, then switch to the pt. 2 and… of course, pt 2 starts playing from the middle not from start.

Are there any ways to reset the step counter? They didn’t mention that in manual.