Hi,
Being the original author of Scan Tailor, I am aware of this problem. Unfortunately I've stopped working on Scan Tailor a while ago, so it's not up to me to fix this issue. Other people maintain the official version of Scan Tailor now, though I have to admit the project is essentially in a dormant state.
Still, there are a couple of active forks around. One is Scan Tailor Advanced:
https://github.com/4lex4/scantailor-advancedand the other is Scan Tailor Universal:
https://github.com/trufanov-nok/scantailorPerhaps you could approach the people working on those forks. Keep in mind though, that I suspect this problem affects primarily Scan Tailor Experimental, while none of these forks are based on that.
--
Joseph Artsimovich