JTable uses wrong AntiAliasing settings at switching from Synth based L&F (GTK and Nimbus) to Motif LAF

FULL PRODUCT VERSION :
openjdk version "14-ea" 2020-03-17
OpenJDK Runtime Environment (build 14-ea+23-1048)
OpenJDK 64-Bit Server VM (build 14-ea+23-1048, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
RHEL7, Ubuntu 18.04

A DESCRIPTION OF THE PROBLEM :
When Look and Feel was switched from GTK to Motif,
some cells of JTable was displayed with anti-aliasing ON.

Table Header doesn't have the problem.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Launch SwingSet2 demo
2. Switch to JTable demo
3. Change Look and Feel to Motif
4. Confirm First Name, Last Name, Favorite Movie are displayed with anti-aliasing OFF.
    This is the expected behavior of Motif LAF. (motif_normal.png)
5. Change Look and Feel to GTK
6. Confirm these cells are displayed with anti-aliasing ON.
7. Change Look and Feel to Motif again

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected:
These cells, such as First Name, Last Name, and Favorite Movie, are displayed with anti-aliasing OFF. (motif_normal.png)
Actual:
These cells were displayed with anti-aliasing ON. (motif_aftergtk.png)

REPRODUCIBILITY :
This bug can be reproduced always.

ADDITIONAL INFORMATION:
When switching from GTK to Motif Look and Feel, aaHint seems to came from
javax.swing.laf.synth.SynthTableUI$SynthTableCellRender
instead of
javax.swing.table.DefaultTableCellRenderer