Need help with MontagePlay function

I have similar setup to First person example, where you have animation blueprint that takes care of walking, jumping and idle animation (for simplicity's sake there is only idle animation) and for firing it plays a montage

The problem is: when i want to play montage with shooting animation on my character it plays only small part of it despite the fact that montage in editor plays normally, but when i want to play reloading montage which is copied from firing montage but with different animation it works fine.

here's how it looks [https://youtu.be/dEQdFsIsoqk](https://youtu.be/dEQdFsIsoqk)