PM4 - Doesn't count blocks correctly

[MrBlasyMSK]

Describe the bug
If you mark positions 1 and 2, it will count all the blocks up from the position you have marked

To Reproduce
Steps to reproduce the behavior:

1. Position mark 1
2. Position mark 2
3. It will appear that the number of blocks selected is incorrect

Expected behavior
That, the blocks will be counted and placed correctly

Screenshots

System information (please complete the following information):

• OS: linux
• php version: 8.0.9
• BuilderTools Version: dev166
• Server version: 4.0.0+dev (git hash: 2e153624adec62e8bfb6784ac1488c5c2039671e)

Additional context
Here is a video reproducing the bug: https://streamable.com/rxgrya