ID 509129 - Gamma slider stutters while being moved

Problem summary
Gamma slider stutters while being moved
 
Customer reported version
Mari 4.8v2
 
Customer reported platform
CentOS 7
 
Steps to reproduce
 
1) Launch Mari

2) Move the Gamma slider back and forth
 
Expected behaviour
The slider should move smoothly
 
Actual behaviour
The movement of the slider is stuttered:

 

 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Mari 5.0v2 - Windows 10 - CentOS 7.9
Mari 4.8v2 - Windows 10 - CentOS 7.9 - regression
 
Unable to reproduce bug in:
Mari 5.0v1 - Windows 10 - CentOS 7.9
Mari 4.8v1 - Windows 10 - CentOS 7.9
 
Earliest version tested
Mari 4.8v1 - This issue doesn't appear in this version and has regressed