ID 542377 - Changing the Axis setting of the Gaussian1D Bake Point Filter doesn't update the Preview

Problem summary
Changing the Axis setting of the Gaussian1D Bake Point Filter doesn't update the Preview.
 
Customer reported version
Mari 5.0v4
 
Customer reported platform
N/A
 
Steps to reproduce

1. Create a node with image data, such as a Cloud node.
    
2. Create a Bake Point node and input the previously created node.
    
3. In the Filters tab of the Bake Point's Node Properties, click Edit Filters.
    
4. Select Gaussian1D from the Add Filter dropdown list.
    
5. Turn on Preview.
    
6. Set the Radius to a high value, such as 50.
    
7. Try changing the Axis from 0 to 1.
    
8. Unselect the Axis setting, and notice how the Preview doesn't change.

 
Expected behaviour
As soon as the Axis setting is unselected, the Preview should update the filter, taking the new settings into account.
 
Actual behaviour
There is no change to the Preview when the Axis setting is unselected. 
 
Workaround
Turning Preview off and back on previews the Filter with the updated Axis value. 
 
Reproduced by support
This bug has been reproduced in:
Mari 6.0v2 - Windows 10 - CentOS 7
Mari 4.8v1 - Windows 10 - CentOS 7
 
Earliest version tested
Mai 4.8v1 - This feature did not exist before this version