What are the causes of tightness/pressure and pain after BA revision Surgery? Is going back to unders ok after 1yr? (Photos)

I’m 9 mths P/O a BA revision with HP silicone placed subfascial via peri areola.Issues are pockets created too large causing implants to flip often,pain on side and lower pole area where rippling is visible, Tightness/pressure around upper pole area on the smaller breast, uncomfortable laying on stomach and implants that move when breast is gripped.1st surgery was Transaxillary silicone unders in 2018 by a different surgeon.Due to animation deformity and still asymmetrical a revision was done.