Cancel 301 redirects

#1
Hi! Nobody has encountered a 301 redirect canceled?

We used to have 2 sites of the company, we decided to leave one (new) one, and on the old site to register 301 redirects to transfer the link mass.

After 301 redirects from the old to the new site, it grew in positions, after a year it collapsed. If you cancel a 301 redirect on the old site, is there a chance to return the old site positions?
 
#2
Hi! Nobody has encountered a 301 redirect canceled?

We used to have 2 sites of the company, we decided to leave one (new) one, and on the old site to register 301 redirects to transfer the link mass.

After 301 redirects from the old to the new site, it grew in positions, after a year it collapsed. If you cancel a 301 redirect on the old site, is there a chance to return the old site positions?
In theory, this might work, but the probability is too small.