U64: Wildbunch demo twister problem

[TomCat666]

Wildbunch demo by Focus,... : https://csdb.dk/release/?id=41462

In the twister part right on the edge where border starts there is a corruption:

It seems this might be a similar problem to Comaland, one byte problem right before the border starts...

U64 1.41 - 3.10c