TY page UI extension isn't executed after Post purchase extension step

[elastic-s]

Hello,

I've noticed a very strange issue during tests of Post Purchase and Thank you page extensions in conjunction. 

When a customer goes though Post purchase funnel it seems like it is landed on a Thank you page, where the extensions are not available. If I disable the Post Purchase step, the Thank you page extension works fine.

Is there anyone who has both extensions working for a single customer session?

Thanks in advance.