Problems switching XC70!

Hello Volvogemeinde, I drive the XC70 with manual transmission and now it has happened to me several times that when I switch from the 4th to the 5th gear, I switch off! That’s because my reverse gear is right in the back and that’s exactly above it (where the 7th gear could actually be) is nothing. But that’s exactly where I always manage to get there. I know, a little strangely formulated, but I hope you know what I mean!? 😉 There should be some kind of barrier that I don’t come to this level, or do I see this too narrowly now? Looking forward to your opinions! Greeting bus_passes