MikroTik problem in ANDROID Device "Galaxy J7 SM700H"

Hi Everyone ,
I’m New in MikroTik Server i have v6.32.2
Can any one have an Idea why most android devices are working correctly in my Hotspot , but i have problem just in “Galaxy J7 SM700H” ?
it’s usually connect quite alright with AP and take IP from my DHCP. And the login page will appear for it to continuous , After 2min automatic disconnect & connect by it self
and problem Repeat repeatedly but theses devices are working on other Hotspot around.

MikroTik Server Log appears to this Device or any one have same:
dchp1 deassianged
dchp1 assianged

I tried to change DNS from 32 to 16 , 20 , 24 but not work

Please Help