Incorrect operation of RotoPaint CloneTool mode(Bug):

[Sergey-5000]

Make sure to follow our issue report guidelines

• I'm using the latest version of Natron (not required but recommended)
• I've restarted Natron and the issue persists
• I've run Natron via the command line and the issue persists
• I've followed the contributing guidelines to the best of my understanding
• My issue is not on the issue tracker or in a pull request already (go search for it and dig around a little bit!)
• This bug is reproducible

Natron version

Natron 2.5

Operating system

Kubuntu 20.04.5

System specs

No response

Did you install Natron using the official installer?

• Yes, I used the official installer
• No, I installed from a binary archive
• No, I compiled Natron from sources
• No, I installed Natron via another method

Custom installation path

No response

What were you trying to do?

I used the RotoPaint node in CloneTool mode

What did you expect to happen? What happened instead?

In the RotoPaint node in CloneTool mode, when choosing "from" and "to" pointers do not move smoothly with the mouse. The problem is tracked on different versions, but in one version of Natron everything works correctly: "Natron-RB-2.5-202111012250-075ea8e-Linux-x86_64"

Step-by-step reproduction instructions

A video demonstrating the problem can be seen here.
A test project to reproduce the problem can be downloaded here

Additional details

No response