I have had plenty of success using a mirrorless canon (EOS-M), and sony (A7R-2, A7-3) for buildings etc. with and without optical stabilisation enabled... but i do see changes to the lens parameters post optimisation when using optical stabilisation.
For the A7R-3 (and assuming it is like the A7-3) i suggest you setup one of the two special modes for photoscan so that disables optical stabilisation, sets the aperture for maximum depth of field before fringing (e.g. 8.0 for my 24-105), and focus is wide and close.