Yes, I can confirm the same situation.
Beginning from 2.23 version on TUBE algo (cuckaroo29b) all my videocards slowed down speed almost half.
Version gminer 2.22 to 2.23
MSI 1080 ti from 8.8 > 8.3 g/s
GTX 1080 aorus from 5.45 > 5.08 g/s
Version gminer 2.23 to 2.24
MSI 1080 ti from 8.3 > 5.3 g/s
GTX 1080 aorus from 5.08 > 3.4 g/s
It seems two last versions are bugged, especially gminer 2.24
Very bad updates.
Stable last good version of gminer it is 2.22
I rolled back to this version.