OK an update to the rear pedal/ABS issue.
After 6 months, of having no issues, I had on 1 occasion did not ride the bike for 10 days, and the pedal got a little stuck but recovers and throws a ABS check light. I then did a 10X cycling and bleeding for the rear and about 3X for the front. So far no issues after sitting the bike for more than 10 days.
On another issue, I had been lazy with the clutch fluids where the lever doesn't actuate the slave pump. Adding salt to injury, the reservoir philips head screw got stripped and had to drill the head out. Thinking that the slave pump seals were gone, I just tried bleeding it to see if I can recover. Fortunately, it recovered back to normal. Lesson learn, clutch actuation are used more often than brakes and would require shorter bleed cycles.
It will be a yearly event to change brake and clutch fluids. And have purposely purchased 350ml size bottles instead of the 1L. Open bottles (but closed back) should be used not more than 1 year. One of my ABS issues and for the clutch was contaminating the fluids with old fluids. The corrosion factor accelerates exponentially.