Afaik, Rift lens has a couple of issues currently that I ran into.
- Rift lens' timer in normal stages is infinite?
- One rift is completed when you enter a stage.
- Rifts give no items.
- Rifts complete after 'closing' one.
- Rift timer on Commencement is 6 seconds.
[ Log File ] (All of this was one run)
https://pastebin.com/rq51XGG2