@Martin.Jirsak, just checked the script in CB13.0.55. No issues there, though I used the identical script. This means, that internally Cubase 14, when we reach the 0 quarter, doesn’t move to the previous bar.
If you open CB13 and set the cursor, for example to the position 2.0, you will see that (correctly) it goes to 1.4. Now if you try the same in CB14 (0.32) instead of decrementing, it goes to 2.1. This is surely the issue, not sure how the hotfix was done, perhaps they concentrated just on the MCU side.