My Aspire A515-45 (AMD 5500U) Battery is not charging even if below 80%, battery charge limit "ON"

ToTo77

First of all, please understand if I am not good at English composition because I am Korean.

After setting battery charge limit option to "ON" in Acer Care Center, my Aspire A515-45 (AMD 5500U) Battery is not charging even if below 80%.

In the order below

1. I set battery charge limit option to 'On' in Acer Care Center.

2. After I connect the AC adapter, Battery is charged to 80%.

3. I disconnect the AC adapter and drain battery to 50%.

4. And then I connect the AC adapter, but battery is not charging.

5. After I set 'Off' battery charge limit option in Acer Care Center, Finally battery is charging.

I repeated this case.

In most case, battery is not charging even though battery charge limit option is "ON" and battery is below 80%.

Sometimes the battery charges, but I don't know why battery is charged.

I contacted to official Acer support in Korea.

According to the first guide,

I update BIOS and reinstall Acer Care Center.

But Problem is not still solved.

I re-contact to Acer Support. 

They tell me that it will be solved by update later - Maybe BIOS or Driver or Care Center App..

Has anyone experienced the same thing as me?

ToTo77

in addtion.
OS : Windows 10
I've been using this laptop for about a month.